Well GW2, WoW, EQ , Lotro, ULtima Online (yes,, old UO) got Day/Night system . In ToR there is not even weather effect (to much work to do )
In SWG i remember nice night sandstorm on Tatooin , or great rain on Yavin - from Bioware we got Dead planets not worth a visit again.
I must say.. i love GW2 for real live world - walking npc , talking with each other or singing (example
) why bioware can't add that in own game.