This is good to hear, I was a little nervous about this games performance and I hope Square Enix are still confident in this series and we'll see more. I do wonder if this entries targets were a bit lower due to a different studio taking the lead.
I was a bit apprehensive with Shadow, it's initial reveals didn't look very impressive and it's reception was rather lukewarm, but I ended up borrowing it from my library and was so impressed I immediately bought it (though it was on sale) with the DLC and it's easily my favourite of the reboot franchise. If i'm looking at them all critically, I do think they are all probably about even in quality, each with it's own strengths and weaknesses, with perhaps the first entry still being just slightly the best, but Shadow's much bigger emphasis on it's puzzles and exploration and reduced focus on combat really worked for me. I love how this entry has different difficult settings for those 3 core elements too. There was so many moments of awe and inspiration, and it felt paced far closer to the classic series and I really appreciated that. Didn't feel like it was jumping me from set pieces or forcing me into combat encounters too quickly, it really gave each area and story beat room to breathe. I quite like how the DLC works and added more puzzles and quests into the base game, or had them as optional extras for challenge runs, nearly doubling the amount of challenge tombs in the game. A big improvement over the fairly mediocre expansions that Rise saw, at least for me.
If anyone that enjoyed either of the first two but is on the fence about this entry, I would highly recommend it. Know that it does take a step back in some areas, the combat isn't quite as strong, most notably the feedback from enemies (muzzle flashes on weapons being quite basic, no blood splatter effects, combat just has a little less life in it), and some of the sound design is a bit weaker (those really nice UI sound prompts are quite a bit more basic), but the overall sound design is still strong, with a very good musical score and weapon and environmental sounds. The story is about on par with the last two entries, the dialogue is a bit poor and story overall is fun, and executes on some themes and tropes better than the past entries, but I wouldn't call a step forward in it's overall execution. It really excels with it's environmental designs and puzzles though, that is where the game shines and what I look for in a Tomb Raider game. There is a lot more I could get into, but that's not really what this thread is about and I just waned to quickly give my opinion on the game.