Even though I really liked BS3, I did find the puzzle a bit uninteresting and too simplistic. The crate puzzles were pretty annoying and so were the stealth parts. Adding those stealth parts wasn't a bad idea but they were just too long. I really liked the 3D transfer though. I'm really looking forword to part 4 and definitly hope they get "it" right this time.
Also check out Broken Sword 2.5!
http://www.brokensword25.com