Dude if you're looking to redesign him I'd say keep the wing and ditch the horn because the tipped wings dont look too bad or out of place. The colour of the mane/tail is fine, but change the muzzle to the same colour as the coat of the pony. I'd also say remove the markings under his eyes and chest, and if it looks alright, you could possibly keep the ones on his hooves, but the swirly ear looks fine on him. Also maybe giving him a new cutie mark to spark his personality more would look nice.
They accept most things sent to them, that's the point, even if their double posts. And any sent by the artist themselves always gets accepted. The artist is obviously not bothered if he was the one who submitted it.