I propose to change the progression 4cover you will get from 3 gamora (currently starlord) to 4* gamora would make way more sense.
Especially as 3* Star Lord will also grant you 4* star lord covers.
They do occasionally update these rewards, the last one we had was about four months ago (April 21, I think). Well, not counting the update to 2* Hawkeye giving Hawkguy covers a few weeks ago.
I imagine when they update the rewards again, they will make this change.
Please update 3* rewards as noted