I finished True Stalker. It looks great and it's a great feeling to walk through the reworked areas that evoke nostalgia and yet are sufficiently new and interesting through both new looks and new context, plus the one new overworld map is great as well. The authors focused more on things looking good than on realism, and it does often work, especially at night. Night in bloodsucker village was just gorgeous.
However gameplay-wise it's profoundly meh.
There's been a significant deserved pushback against people who call Anomaly or GAMMA the definitive Stalker experience, because those mods strip away too many things that made Stalker what it is, focus on the sandbox aspects and just make it into a game with considerably different fundaments than the trilogy. True Stalker has the same problem in the opposite direction. It strips away all the semi-openworld sandbox elements, any feeling of agency and A-Life and focuses on entirely linear story focused gameplay.
The overall story and world building isn't bad. But the quest design is mostly shit, so even if the story subjects of the quests are interesting (and they often are, both in the main quests and side quests that are numerous and often large), the gameplay is often close to "watch a cutscene, get teleported to a place, shoot a few enemies, watch a cutscene, end". At least in the mid to late game - early game doesn't teleport you anywhere and instead features a very boring amount of walking back and forth. There are no fast travel guides like in CS and CoP.
And while the story itself is fine and has good ideas, the execution is lacking imo. I only played the english translation, which is serviceable but not great (though I've heard that the writing isn't that great in russian either). There is a controversial decision where in about 2/3 of the game you suddenly swap characters and play as someone else for the rest of the game. I think I can understand what they were going for, but the context just didn't feel that well done. The overall message of the ending seems to be kind of "you don't always get a happy ending or even a catharsis because the zone and its inhabitants don't give a fuck about you", which is not a bad point at all, but for me personally it didn't really have an impact, ending felt more like "well, this is it I guess, okay bye".
From a technical standpoint, the game is incredibly polished. More polished than many commercial games. You can feel that a ton of work went into it. But as with the weird new inventory system, it feels like the work was sometimes misplaced.
edit: Oh, and as a part of the story you lose consciousness I think over 20 times through the whole game. Sometimes by getting shitfaced, sometimes by getting shot, sometimes completely nonsensically. Sure, you can knockout a trained military stalker in an exosuit with a single pistol-whip. Maybe they thought it was a funny running joke.