I did Haltari this AM with DF Roulette group in 30mins on my LvL21 2nd job archer in 30mins, yes it was trivial. I got 1000+ XP per trash mob and got the whole level to 22. Yes it is trivial for the second job but you will have to acount for the super-casual crowd, like the WHM that wears LvL30 gear and wipes normal Garuda because she runs out of MP. Or the LvL50 archer with the LvL47 grey bow......

If you want to change dungeons, they should have iLvL requirements, a 50 with an grey weapon has no business in HM primals.