What really bothered me was that the player must act not like a mage but like a brainless goon. The other mages and the Psijic guy pretty much tell you where to go, what to do and how to do it, and at no point do you actually have any idea what's going on. You don't find out what the Eye of Magnus really is. You don't unearth amazing new arcane knowledge. In Labyrinthine, you don't actually find out who/what Mordekai is (why not have a bit of a conversation between him and the PC? It would have been a great moment of exposition, and just generally a very interesting encounter - instead, you release him from his blue prison ball and suddenly he's shooting lightning at you and then you kill him and it's over). You just go where some guys tell you to go, and bash various undead and elves until you are The Winner. Then the Psijics (aka fun police) show up to make sure you don't actually do something interesting. It's also aggravating that the Psijic constantly reminds you that he knows way more about everything than you and that he pretty much knows what you're going to do before you do it. I mean, you're supposed to be a talented young mage, not a braindead killing/fetching machine. I'm not asking for a complex multi-path quest; I'd just like it if the quest would treat my character like what he is: an intelligent, powerful, ambitious individual with the ability to warp the fabric of reality and shoot massive balls of fire from his fingertips. Not an ambulatory programmable vegetable with a flamethrower strapped onto its head.
Despite all that, Labyrinthine was a pretty cool dungeon crawl and the quest line was certainly great fun to play. It could just have been so much more if it was written in a more compelling fashion. It probably kind of needed to be a little longer, too...