Pretty much what the title says. Is this really necesarry? There are people that would still want to do some of the 75 content but can't because they can't even rally up 2 other players. SE pretty much killed 75 and since a lot of old content can be solo'd, might as well remove the 3man requirement don't you think?
I understand this is an MMO and you're supposed to play together, but if you can't even get other people to do it then there's no point. SE loves adding content and letting it die, but at least make it still usable.
Of course some changes would have to be made, for instance you wouldn't be able to solo Nyzul Isle the lamp order floors. Not like anyone likes lamp floors so they might as well remove that entirely if you ask me.