Art style can be a technical restraint. realizing that
skyrim is just one province, and all those models and textures were created over the course of 5 years would do you some good.
games are not easy things to make, lol. and none of this is complete or final art as you know, but dont get your hopes up for a total art style revision :/ its done.
they have the entire continent of tamriel plus future updates, they chose a style that lets them work a little faster and get more content available.
as far as gameplay, Tes:o still sounds alot like gw2, the limited hotbar, active blocking, stamina, weapon abilities coming before class abilities, breaking from the trinity.
all that sounds great to me

, its better than oblivion and morrowind combat [duh]
roleplay might suffer a bit, if you dont have an imagination
