Honestly, I'm okay with a content finder as long as it's similar to party search in that you flag up for quests/raids you want to do and then people forming groups can ask you or you can ask people with their flags up.

I will not be okay with a content finder if it autogroups your by making you fill up slots with healer/tank/dps/support. Also no teleporting to instances, that completely breaks the entire immersion of the game.