It's hard to compare RoR to AoR dungeons/sets, because both have been altered heavily.
On live (AoR) GB and BS gave some mediocre t3/low t4 sets. The stats of those sets have been boosted in RoR. Plus all PQs inside the dungeons have been removed, you had to kill literally hundreds of mobs to progress. That's why noone did them (except some maniacs for tome entries )