Some really interesting ideas here! I especially love the choice of instruments.
I think you could benefit from playing with rythms more, like on the space between each note as we usually mean, but also on the duration of each note so it well sound less choppy and add some variation.
In bossa rythms they usually use long notes then a short one (so as to cut it), or short then long, which would suit the guitar nice here. And for the vibes, it's a sustain instrument so you can use longer notes!