Don't know if there's a way for you to tweak the wings to be more show-esque or pegasus-in-general (since they are very Dashy oriented, not that I'm complaining) without compromising your own amazing style...but if there isn't, keep it the way it is!
Looks good, but the yellow/beige "lions mane" just looks strange and seems to detach the head from the rest of the crest (makes it look more like a mask laying on top of everything else). The rest looks great, but that specific area needs... well I don't know what (I'm a writer, not a visual artist :/), but something to make it connect everything together better?
This is so awesome! And I'll definatly buy it when it's aviable in Girls Fitted and the time's right! (Meaning, in spring so it's in time for summer and also there are enough t-shirts to justify the shipment costs... XD)