Doesn't concern me as I play with keyboard and mouse, but it's not like there's any thinking involved in spamming the Halone combo for example, whether you push 3 different buttons or the same one 3 times really doesn't make a big difference, I don't see this as something that could bring any harm or unfair advantage. Would be nice to get something like that on keyboards too, though. As someone mentioned in this thread previously, Aion had your combos automatically proceeding to the next strike in the same skillslot, and it worked wonderfully well.