The game has great aspects, but I do not view it overall as a great game; my feelings towards Fallout 3 and Skyrim are even worse, much worse in fact. While it is impossible for me to consider the games without bias, I feel that I am able to put the majority of my baggage to the side when criticizing the Bethesda games. A great game to me is one in which the faults are minor nuisances, slightly cumbersome interface, perhaps incoherent lore, &c. but when they are so numerous that I lose count I just cannot regard the game so highly. Bugs and balancing are not issues that I at least brought up, nor do they typically factor into my estimation of a game unless they render it unplayable, but while I most certainly appreciate the systems design in a complex RPG, what primarily draws me to them are the aesthetics and the various creative interpretations of the tabletop experience as converted to computers for single players.
Fallout 4 meets almost none of this personal criteria and this only bothers me in light of the loss of what the series used to provide, although I've long since acclimated to acquiescence of the inevitable. It is a decent, but not great first person shooter game, and an alright crafting and settlement building game, but as far as roleplaying is concerned in relation to what came before it is hardly even recognizable. The freedom to explore and play the game at your own pace is nice, where that applies, but your own style is the same style as everybody else because it is only a singular affair. This invariability, aside from the grotesquery of the presentation and its relative brevity, was likewise my biggest grievance with The Outer Worlds. It doesn't matter if you develop your character to specialize in melee weapons, or energy weapons, or unarmed, or stealth, because every character is capable of every approach exactly as was the case in Skyrim, the differences are purely cosmetic and any negative modifier is easily compensated for.
For me, Fallout 4 necessitates mods to transform the game into something more enjoyable, while Fallout 3 outright requires it.
I regard Oblivion in a similar sense as I do Fallout 4, in that it has certain aspects that are fantastic, but its aesthetics are utterly atrocious and the main quest line is possibly the worst thing Bethesda has ever released; nothing can compare for me with the Oblivion Gates, the fact that they pop up all over the place and the ostensibly radiant AI NPCs simply continue to go on about their lives as if nothing was happening while the few comments you do actually hear concerning them would lead you to suspect that Tamriel was being overwhelmed with an outpouring of Daedra, yet when you approach a gate what you see is two, maybe three Daedra calmly walking around in circles within spitting distance of it. Oblivion has so many profoundly negative aspects (like the happy/sad dialogue "mini-game") but there is, somehow (probably because of Ken Rolston) a decent game beneath the surface, the exploration in it is actually enjoyable and the Knights of the Nine is one of the best DLC ideas which was unfortunately executed very poorly. I'm unaware of the general opinion here regarding the other DLC Shivering Isles, and I've been condemned numerous times for my opinion of it, but when I heard Michael Kirkbride on a video dismiss Shivering Isles as awful and the cohosts gasp in astonishment, it led me to appreciate his insights. That DLC is the most juvenile and puerile caricature of mental illness I've ever seen and I'll just leave it at that. Fallout 4 at least had decent DLC in Far Harbor. Anyway I'm rambling but wanted to clarify my position. My feelings on the game are schizophrenic, or perhaps manic, bipolar extremes between which reflect my confoundment. Like I said before, it is both excellent and abysmal, but neither consideration approximates to a uniform value. Some games are overwhelmingly great or terrible, but most require a more nuanced estimation and cannot be summarily pronounced as one or other without qualifications.
I think what many people fail to realize is that game design, like many things in life, is about making trade-offs. Yeah, we all want the game with the freedom to explore everything and deep and meaningful crafting mechanics, and base building that has a point, and romance plots, and impactful choices, and NPCs that have unique character, and Dark Souls combat, and, and, and... But of course game companies are working on a budget and you have to either go deep and focus your attention into some key areas, or go wide and spread your attention thin.
The Witcher 3 is a game that goes deep in a few key areas: it focuses on plot, dialogue and the combat mechanics. In all other respects, it is a fairly simple game from a gameplay standpoint. Static scenery, almost no world interactivity, simple NPC's, no interesting item mechanics, etc.
Dark Souls is a game that goes even deeper and focuses almost entirely on the combat system.
Elder Scrolls are games that sacrifice depth for width. Many game mechanics are shallow - the plot, dialogue and combat is not as good as Witcher 3, combat mechanics are nowhere near as nuanced as Dark Souls, but ES has much more to offer in other areas that the other games completely lack. You can build/buy and decorate your house, almost every item you see is a real object you can manipulate, there are interesting item mechanics with enchantments and special abilities, NPCs have schedules and there are random encounters, and a varied magic system...
Naturally, a lot of the mechanics are mediocre compared to games that choose to focus on that mechanic, but the game is a sum of it parts, and personally I enjoy the variety and freedom Elder Scrolls game offer. Add mods to the mix to enable the community to greatly enhance some of the gameplay components, and you have a winning formula. I don't fault Bethesda for not being able to compete in every game mechanic with the best games in that area. It's ridiculous that people fault Bethesda for not creating a combat system as good as Dark Souls, or having a good plot like the Witcher, when ES has so much more to offer that the other games completely lack.
Having said that, it's totally acceptable for someone to say that they prefer depth over width. But those people should accept that Bethesda-style games are not for them and move on.