This is exactly what we're doing. If someone rage quits because we finally replaced the alpha 1 club, then they need their heads examined. Sorry but we need to make pbr art for everything. Yes it will look like a whole new game but we feel like 7 days will be in the top sellers for 10 years if we do this, versus just ship it and vanish in 2 years. So every bit of art is getting reworked, and while we're at it, its the same amount of work to make a design match as it is to just redo the old club that had ZERO thought put into it.
That said all the new wall textures and new weapons introduced are pbr, but the gamma lighting made them look not as nice as they could. So its not like we have to redo everything starting now, most of the game is already redone. Every weapon is already redone I just haven't shown them yet because they are in rigging and in game has some bugs right now. It looks stunning though, like shut up and take my money all over again stunning, all for free to existing users.
But as usual, art has NEVER held up the show. Its always just gravy. The code and having designs we're happy with are the bottlenecks.