I found the names of the unreleased songs from a fan account on Twitter, (I can't provide links right now but I'll find them to post later) and they had posted screenshots from another site which lists song that have been written for copyright purposes.
Because Dan can play the keyboard too, so for studio versions and recording, Dan mostly does the keyboard playing.
Kyle does backing vocals for the song Snakes though! So he does have a roll to play in the studio recording for the second album.