This is part of why I'd love to hear them do another covers record. Yes, it's stupid for a band with such a small discography to do multiple covers albums. But there's no indication they'd use Frank in the studio, and Axl could still sound great on Wichita and The Seeker... not to mention some covers of Thin Lizzy, Alice Cooper, The Angels, etc.
Honestly when I saw them in 2017, I Feel Good and Wichita were some of their best songs. They were clearly having fun and sounding good doing it. Wichita is still one of the best songs they play... take the pressure off Axl and let him have fun with classic rock songs, get Brain (or Josh, or any pro session drummer really) and I think they'd knock it out of the park.
That said, Monsters is great, so much better than the other singles... so they'll release at least one last good song