Write and record the best damn album they are capable of producing. Jon and Richie feeling the need to best each other might actually bring out something good, and break the complacency. Write a ton of songs, demo them, mix them up, maybe even re-write them in the process.

Also, some personal breathing space would probably help. If Jon wants to do stuff like the soundtrack tracks, give him that and rework that with the band to make it work. Same for Richie's stuff. Really, for the band members to actually be confident and proud about the material would help immensely.