I would love TBC as the Classic version ended up pretty bad (mostly due to player base though, beside AV, server chaos at launch, bad timing for p2) beside the awesome leveling.
TBC could be a fresh start and hopefully, players learned from their mistakes in Classic (griefing, reserve crap, tryharding etc).
On the top of it, awesome world, dungeons, flying, raids, arena, good class design, resi gear and no unhealthy 24/7 grinding or botting for pvp gear. Sounds good to me.
(Ps: and I wish Classic did not turn how it did, it had to potencial to be chill and awesome, but it was wasted)