Gona leave my own 2 cents, hey I'm on my coffee break so why not?
4.0.6 idea is... Not completely explained by community members i think, going back to 4.0.6 (including tallents, world, dungeons and class related changes) would require so much extra work and not everyone likes 4.0.6 that much so is it worth making the server to a lesser patch?
Depends, i don't really see the future to current server we have today, re-release is not really an option, working on a new core from open-source code that is available might be, especially if the scripts could be transferred from wotlk(which is hardly possible considering how many changes Cataclysm brought)
In retail most people hated 4.0.6 patch cause dungeons were pre-nerf everything was insanely difficult for an average player and i dont have a problem with hard dungeons, i like the challenge, however not everyone raids hardcore 7 days a week and pvp nonstop, some people just do an occasional dungeon and go hunt for transmog or roleplay...
Pvp was really not that much in a better state dying in arena ment that now your partner is left on a 1v1 match. Oh god, your partner is a dk and opponent is a retribution paladin... Time for 45 minutes duel that will end in a tie, really makes you consider horrible things like going out with your friends irl...

