it sounds experimental...kinda like some Snow Patrol spinoff, but it doesn't go anywhere with the sound.

my suggestions?
have some kind of climax in each of the songs. ultimately most of the songs sound flat because there's buildup, but they don't reach any kind of climax. they don't sound like they're going anywhere---there's build and fall, build and fall, but there's not really a climax. that's where vocals are probably going to help you, because a vocalist could probably make a musical climax out of what you guys have.

as far as lyrics...get someone who writes dreamy type lyrics. your love-song and "missing you" lyrics are gonna fit perfectly here. something wistful.