Devs have stated in the past they aim for a specific % success rate for Random Dungeons, since the re introduction of LoMM and CR what is that % now sitting at as from a peronal point of view it will have dropped significantly, every CR I have been dropped into has not gotten past Sisters, most don't leave the camp fire before someone bails and the rest follow suit. LoMM gets to Arcturia then fails miserably until one abandons or the group choose to abandon.
It is down to the Devs to come up with a better way to assign Dungeons, simple ILvl is not enough, when your scalling system is as messed up as it is, it needs to scale stats linearly.
Thoughts and proposals
Would have been a better CDP than ViP