The Answer is... Awful. It really highlights the weakness of the random dungeons in Persona 3, because they're not being broken up by bits of story at your pace: Instead, you have to make enough progress within the dungeon areas in order to get your fix.
It's a simple change, but drastically alters the way you approach the game. Before, if you didn't feel like handling Tartarus, you could always do a week of Social Links or something. As long as you kept an eye on the full moon and made sure to get to each sealed section before the full moon rolled around, you were good to go. Dictating the pace of the dungeon crawling made the repetition a lot more bearable.
Also, Aigis is a lot more aggravating as a main character. A lot more.