Well, I finished Talos Principle 2. 100%'ed it too, unless I missed something. Didn't get all the achievements though, a lot of them require you to solve puzzles in specifically obtuse ways, or take different paths of it's branching story.
I definitely think it was easier than Talos Principle 1. It wasn't unwelcome. Some of the mechanics in the first game were just obnoxious. Like getting blown up by the spheres, or the puzzles where you record yourself doing some shit, and then have to use that recording to do more shit. Getting the timing right on those was always a pain in my ass. Now they just let you control multiple clones for certain puzzles.
At the same time, it took until the very end of the game, on one of the golden door puzzles, for me to finally get the "Spend 20 minutes on a single puzzle" achievement. Maybe I just got really good at the game, but 95% of the puzzles came to me nearly immediately. Although I did have to look up the solutions to two of them. One because I was expected to see something that was approximately 1 pixel large literally halfway across the huge zone I was in, and the other just cause it was late and I was feeling lazy.
That said, while I didn't find most of the puzzles hard, almost every single one had a solution that made me feel appropriately clever. A few I got stumped on because there was some corner case of the game mechanics I wasn't aware of until I started trying wacky shit.
The end of the story was wholesome and a lot more satisfying than the first game. And the last batch of puzzles found one more way to put a twist on everything you'd learned so far. Highly recommend it.
Win95/DOS 7.1 - P233 MMX (@2.5 x 100 FSB), Diamond Viper V330 AGP, SB16 CT2800
Win98 - K6-2+ 500, GF2 MX, SB AWE 64 CT4500, SBLive CT4780
Win98 - Pentium III 1000, GF2 GTS, SBLive CT4760
WinXP - Athlon 64 3200+, GF 7800 GS, Audigy 2 ZS