Need More Guitar/Bass customization – GarageBand Review

So I play both acoustic, electric, and bass guitar. I think it would be great if I could change simple things like the guitar tuning and add better effects like delay. I wish I could play the bass to songs like killing in the name of (a drop d tuning). Other simple things like a ukelele as an instrument under guitar or world instrument. In addition, a wider range of instrument sounds would be good. (For example: slap bass, classical guitar sound, or 12 string guitar). I obviously use guitar a lot and am somewhat biased but these would allow players more flexibility.
Review by Flamenco Flamingo on GarageBand.