On the last record all four members of the popular act switched instruments, took turns singing, and contributed songwriting. Wilson pegs this as the reason for the quick turnaround.
Now that we've got more writers, we don't have to wait for Rivers to have a bunch of songs he's happy with. We used to take forever to make a record, then tour on it forever and be burnt out and not do anything for two years. This is a lot better.You can find more details at Billboard.






Maybe they waited around for Rivers because his songs were better?