There are varying levels of gimp, lol, and a lot of people manage it quite handily. If you play as a full-time job, yeah, Abyssea is easy enough that you'll blitz through it pretty quickly. If you're more on the level of playing a couple nights a week tops, then it'll still take you quite a while, since you're gonna have multiple sets of AF3+2 to work up.
As for Voidwatch, it's considerably more challenging than Abyssea, but still conducive to casual play, since loot pools are all individual, so you can actually run shout groups without having to worry too much about loot allocation.
Of course, all the old-school elitists are royally pissed off that they can't control who gets what, and there are some genuine complaints about the randomness and inability to add the drops you might already have to the loot pool, but Voidwatch is kinda fun.