There was some commentary on TSN/SN that Martin is in Ottawa to put heat on DJ Smith. I'm not sure how much heat that a guy who should be retired will put on him, but it's something between-period folks on both have mentioned.
In the meantime, hunting up an adaptive PP coach should be on their radar in Buffalo. And sadly, some if it is going to be beyond just "what CHL or NCAA HC has a great PP, go get that guy" since so often those folks are the ones who also have either developed or recruited the best talent in their respective leagues.
Case in point, the Warriors in the WHL have an amazing powerplay. And that's because they have Jagger Firkus, Brayden Yager, and Denton Mateychuk out there on PP1. Similarly teams like Prince George (2nd place in the dub), Medicine Hat (3rd) or Portland (2 contract-worthy 20-year olds plus Cagnoni).
Heck, two of the best PP results in Sabre history are by coaches who have either not been able to replicate it here or elsewhere (Arneil) or have been close to league average (Woods). It's going to require a new voice or a new scheme or both or even a different set of personnel AND execution of the scheme.