Ok, I’ve heard back from Justin at Nektar…and what a helpful guy he is too.
The P1 is not class compliant as far as some of it’s advanced computer based macro functions are concerned but it WILL work in standalone mode with a USB host. He has confirmed that he has personally had it working fine with the old iconnect midi. (the new 2 + has dropped the hosting capability for some unfathomable reason and is only available on the 4 +)
This is starting to look like an increasingly interesting option …