I am making a Circle of the Moon druid, and when I flipped through the monster manual to see what I could transform into I was struck by how much cooler Aberrations and Monstrosities are than Beasts. I'm trying to convince my DM to allow me to Wildshape into those forms; my fluff is that I'm native to the Far Realms, where there aren't a lot of Elk but Gibbering Mouthers are common wildlife.
I know that this is somewhat unbalanced due to my previous question, given the differences between beasts and aberrations/monstrositites, so I'm using the following restrictions:
I can't shift into creatures with intelligence 5 or over, so no Nothics or Mind Flayers or Doppelgangers, just things like Carrion Crawlers and Gibbering Mouthers; this keeps my available forms more beast-like, and prevents some possible abuses.
I'm giving up the druid spellcasting abilities to make up for the magical abilities that I'll be given access to. Plus, of course, I am still bound to the same restrictions (CR and swimming/flying speed) as a normal wild-shape druid.
My question is: do these restrictions sufficiently address the balance problems of being able to Wildshape into monstrosities and aberrations, or is that ability still unfairly powerful?