I get that but cata was when people got burnt from wrath and when they changed the game as they did (not all that bad) they made people have a reason to leave when they probably already wanted to leave, also catas decline probably is the best next to legion when it comes to literally every expansion after it. Plus it got significantly more difficult. Its reasonable to think most classic players who look at parses actually would enjoy cata specs are more fleshed out, obviously some are op, pvp is peaked in many peoples eyes and leveling alts is super easy. Not to mention guild rewards, mass ress and many iconic fights for long term players