As for other rehashes, yes I have the same problem with them all. Scholo, SM, the Troll heroics, all of them.
It just breaks the immersion to have the same old bosses alive and well again seemingly unharmed years later with no explanation. Kill a guy and have the Scourge turn them to undead? I can buy that and it makes for an interesting twist as it did with Arthas, Sylvanas and Bolvar if it is not overused. But mass ressurections to fill a boss roster because you are too lazy to create a new guy is just lazy.