Liked:
Pa and Ma Kent being alive
Lois being an actual reporter and less obsessed with Superman
Lois and Clark dating
Lana knowing the secret identity
Lex as powerful business man
Clark being the real personality and Superman being the disguise
Taking the Legion out of Clark's early years
Clark being the last Kryptonian
Clark regarding Earth as home instead of Krypton
Removing all the different types of Kryptonite
Making Bizarro an imperfect clone
The distrust between him and Batman
Toning down the powers
Disliked
No longer a JLA founder. Absolutely no reason he couldn't be a part of the League.
Non Kryptonian/Alternate Universe Supergirl/Superboy/Zod et al. If they wanted to bring these characters back, just make them Kryptonian
Birthing Matrix. It doesn't add anything to have Clark "born" on Earth instead of Krypton
Manhunter shenanigans in Smallville. It complicated Lana's backstory and was never relevant again.