From my understanding, it isn't the lack of engine power it is that the transmission can't handle it. If they beefed up the transmission and gave it a slightly bigger tail it would be a great machine for it's class.
What i've been told is AH are thinking about focusing on the 130 and not paying much attention to the 350's as it's a older airframe and they are already at the limits of what it can handle (with the B3e)
NiB