What design clash though? You could literally port Nostr to the PKDNS world. After doing so, everything in Nostr's design would remain intact (if you wanted it to), so whatever's good about Nostr now would be good about it then. Plus you'd have PKDNS as a new dimension. (Except you can't port it like that because of the incompatible curves, so it's a theoretical exercise, but it does goes to show.)
You could not port things the other way round. So that would make Nostr's design the weaker of the two in terms of flexibility.
