Yeah well it shoots two balls with one trigger pull, so there might be a problem with that at some fields.
But then again if the field isn't strictly semi, then there's probably people using ramping modes etc. so a Nasty Palmers shouldn't be that much of a problem. Especially when I can't see the two barrels being a big advantage, if an advantage at all. But it's cool that's for sure
Maybe you should ask your local fields about that..
You could also check mcarterbrown.com forums to find answers to your questions, there should be some nasty owners there..