I think it looks rice as hell. But that's just me. Like a few others have said sometimes less is more. To much clutter for me Bro. Other than that I think you'd have a bad ass ride
Zebras have stripes, lawmen have badges, Challengers have weight and camaros have excuses. If you are not one of them....why have them...it is a Mustang after all.
Think of a Mustang like a beautiful woman, less they have on....
If they are consignment stickers to earn money at events then keep them, if not, they mean nothing, they just make you feel good.
But let there be no doubt, the car does look great.