I was asked for feedback specifically on the guitar, so I'll do my best to provide it.
I like the lead you wrote. It's not prominent, though, until 1:05 or thereabouts, and when it is, it feels a little bit tinny.
1:47 onwards, too many slides IMHO.
I'm only a basic guitarist, but I speak knowing and regularly watching someone play lead guitar. Outside of there being too many slides close to each other, that sounds like a doable lead. It would probably need to match the feel of the song, though, and lead guitarists who want to complement a song would run into trouble. It feels too samey, is the first impression I'm getting with that lead guitar. The piece itself also feels pretty samey apart from a few parts where it dips down.