i have slightly different view on RF logo situation.
Mirka might initially created the logo but still Nike refined/redesign then finalized the logo then registered trademark belong to Nike. Fed and his agent/management might not pay attention at all and did not claim or put new agreement on the RF logo. That’s their fault. That’s similar mistake like his first contract with Nike in my opinion.
No matter what Nike was the one who developed and marketing the logo.
If fed wants it, someone has to pay for it.
In my opinion, Nike should keep the logo even if they will not use but later the logo can be good a tool to renegotiate with Federer after uniqlo’s 10 years contract. Fed will be close to 50 years old but he might be still popular for tennis community and who knows he will turn to coaching career. Nike can launch retro Federer line or Federer brand might be even possible during that time. Fed himself, It will not be bad for a few millions from Nike for the project even though it won’t be like Jordan brand. Some people might not agree but I think it’s possible.
Well...while I can't agree or disagree with the premise you present on the origins and collaboration around the production of the RF logo.... but it seems you agree with my point that the RF logo is basically useless to Nike without Fed actively tied to it. Nike obviously has some sort of financial arrangement with Fed at the moment. Otherwise, he would still be wearing Vapors without the RF similar to when he first went over to Uniqlo.