I'd hate it if they stopped making dungeons entirely. It's the only content where we fight "regular" monsters in large groups and then boss monsters in a somewhat seamless transition. Deep Dungeons do away with large pulls at high floors, and you have to zone up to the boss floor.

There will be an expert roulette as long as they make dungeons. Which if they stopped doing entirely, there'd be a large fracture between the dungeon laden content and the content that came after.