I would not call this a "casual" thing as many of the players of any MMORPG are just as "hardcoe" as Everquest's players. Modern EQ has submenus that list every single quest and mission and raid in the entire expansion anyway, but honestly sites like Allakhazam listed all that after the first wave of players found them in the past. Everquest's way of finding the right keywords may have some nostalgia value but it's more a product of antiquated 1990s design than any hardcoe or casual aspect. I am surprised to hear you can redo your stuff in most modern MMORPGs though. Honestly if that sticks it's probably better game design in the end, especially when people put so many hours into their characters. Leveling in a single player game is so much faster it's not as big of a deal.
IMO the reassigning of skills/perks is and pretty much should be exclusive to MMOs because its a group environment with different roles that are required to play because it is a group/social oriented game and its designed to be that way.
i would compare reassigning perks in skyrim to reassigning classes in MMOs
While skyrim on the other hand you are by yourself going through these adventures/trials and the way you choose to play sort of in consequence, shapes you into who you are, choices and consequences being one of the main philosophies of the game. Seems to me that feeling wouldnt be there right from the start if you knew that what you did really didnt matter at all, say "Oh ive been training to be extremely skillful with my blade in shield forever, have fought many battles to gain my immense knowledge and experience with the blade" but then when you go against enemy blah blah you feel like itd be easier if you blinked your eyes and wrinkled your nose and magically you have the knowledge of a highly trained mage and you forgot what youve were doing for the past X years.
Also theres the sense of accomplishment after you completed something but you were the underdog for once because say you chose the path of two handing berserker and the quest would have been much easier as a mage. Then later on you tear through something because it was geared to be slightly in your melee favor.
EDIT: id like the idea of maybe saving up the first 5 and then after that after that you had to spend them or you couldnt accumulate any more unless you spent them.