Why can't we have dungeons with multiple paths/open areas?

[AskaRay]

Queue in DF:
Me: Hey can we explore a bit
Everyone else: No gotta get in and out for my tomes!!!!!! If we can't do the dungeon in ten minutes this party sucks!!!!!

To be fair I'd also like some multiple path dungeons (that arent full of poison and in a tunnel yes I'm talking about you toto rak)

[Samsta]

Queue in DF:
Me: Hey can we explore a bit
Everyone else: No gotta get in and out for my tomes!!!!!! If we can't do the dungeon in ten minutes this party sucks!!!!!

To be fair I'd also like some multiple path dungeons (that arent full of poison and in a tunnel yes I'm talking about you toto rak)

Maybe not put them in the roulette, and make the dungeons award you with crafting items/minions etc. rather than tomes, so they will not be tome grinding dungeons but have exploration and different goals that you could do with your friends. Would be really refreshing.