I have it, it's not too bad but no real changes from GH5. IMO what is killing GH series is the lack of DLC compared to Rock Band.
I also seem to have lost my booklet so I can't import my GH5 tracks to WOR, which is a pain in the ass.
I'm going to sell off my GH equipment and games though and buy all new RB3 instruments, for the above fact of the realism - and access to a MUCH larger set of songs. I do think GH > RB gameplay wise, but in the end, it's the songs I care about and GH lost that battle by being cheap as hell.
That said, I'm currently #6 - #12 on about 6 tracks for the vocals on the worldwide leaderboards
