Castrum and Praetorium were long even when it wasnt trivial. Most players do not like running it but do so because the MSQ Roulette gives decent xp
Most dungeons are ran wall to wall especially with a whm healer because there is no danger. Between WHMs "oh shit" buttons and holy, nothing should ever hit enough or live long enough to be a danger, even with a massive pull. Even at low levels, theres not enough danger to really go 1 pull at a time.
As a healer main, i dont really care one way or another.