best effort was to make it Oblivion with guns.
The irony is: FO3 was called "Lolblivion with guns", but it didn't really deserve it. Beth made quiet a lot of effort to bring a bit of Fallout to the new (console) kids, main complaints were writing and retardo locations like Megaton or Little Lamplight. But mechanically it was pretty decent design given what they had at hand. Look at how Obsidian fixed those writing problems and popped out a really good game with F:NV.
Fallout 4 on the other hand suffered from Skyrim's yuge success. Everyone else wanted to make "a game like Skyrim", obviously Bethesda's leadership as well. Beth has adopted a "no risk, copy what other successful games introduced" approach for a while now. Creativity seems to be overruled by an analysis of cleared achievments, popular mods and a vocal minority.
So this time we really got "Skyrim with guns", as they envisioned it on a spredsheet. Except a rushed low effort version of it. Skyrim's variety of landscapes was replaced "everything looks the same", all it's towns with different "styles" were now... not even bothered with. Players will build their own towns for us! Skills were replaced by perks, but instead of TES' "increasing-by-using" approach they stuck with XP, so if you decide at lvl20 you are now a master hacker despite never using a terminal? It just works.
For FO76 they once again drew the wrong conclusions, assuming exploration, base building and gunplay is all the players want.
As I said earlier, Beth will put the blame on that "external studio" if needed, and make sure everyone knows the next TES is completely "in-house" developed again, by the very same persons that did the yuge Skyrim. And had nothing to do with FO76...