Cutie marks are really, really up for interpretation. I mean, look at Cheerilee. She's a teacher, so she has...flowers with smiley faces? And Pinkie Pie has balloons, which symbolize her talent at throwing parties, but that's not her job--she's a baker. So there's no real problem randomizing images for cutie marks, any more than there is in randomizing physical appearances and personalities. It all comes down to the investment the player puts into the story.
Nidokoenig, I was really confused by your use of the word "conjure." Turns out you're using it to mean "do magic," but it doesn't mean that; it means "summon magically from nowhere or from a great distance." "Transformed" would be better.
There's no way to restrict job functions by caste, is there? Because really, only unicorn and royal ponies should be able to transform anything.
Speaking of horns, I suppose it'd be impossible to make chanfrons with spiked rondels, wearable only by pegasus and earth ponies, that would add a stab attack? I don't know squat about modding, but it sounds to me like it would be difficult. The only instance of using armor as a weapon that I know of is the shield, and that requires a grasper, so I suspect it's not treated as armor at all.
I just got an awesome idea. Buzzards should be able to buzz in adventure mode.
I also detest buzzing noises.
How long have you had that signature?