You know, the things in cover band songs that require planning and work: correct harmonies, dynamics, actual appropriate rhythm guitar, the use of singers who can actually SING. This has been a peeve of mine for several years. A band member, guitar player, last night told me, as long as you get the song's identifying "lick" correct, you can passably play most any song on a gig. A couple of years ago, I auditioned for a beginning-project Eric Clapton cover band, started by the lead guitar player. A song list was sent out. I learned all the song parts, structures, vocal harmonies, and instrumental sequences. During first band get-together, no plans had been made for a decent lead vocalist, the lead guitar player tried to sing leads, he sucked but didn't know it. By the end of the rehearsal, any plans had been abandoned, and they ended up just jamming the lead guitar parts, with the vocals / harmonies absent.