Vanilla is going to be harder than vanilla, and there will be no wbuffs nor tougher bosses in raids. The MC was often criticized by players as WOW TBC Gold it was a joke. The problem has been addressed to a certain extent. They're also supposed to fix mage boosting. This should improve the world's interaction and leveling experience.
A lot of "Classic" players would like #nochanges. Classic+ would not be Classic and would appeal to players who are not "vanilla focused" players. Modern MMO players would like a modern design while old-vanilla players will want a simple cheap Burning Crusade Classic Gold design and would prefer "no changes" because they're poor in their games...