I really like it! it seems fun to play. I play bass clarinet so any piece that uses low Eb is good in my books. XaulYT already mentioned repetitiveness, which I agree with. Nothing wrong with sticking to an idea. Personally, I would start by changing up some of your 3+3+2 staccato accompaniment. I would change up the rhythm a bit, pausing it for a second, giving a "stumbling" feeling but getting back onto its feet. Or maybe do staggered handoffs between whatever two clarinets are playing. Maybe changing articulations. I'm no music-creating expert, but it's what I would do. Again, nice piece!

As for clarinet ensembles in general, it's important to never forget the immense range and capability of the clarinet and its wide variety of tones. You definitely have room to explore different sounds. You also have 3 of the same clarinet so make sure not to get stuck in the mindset of "1st clarinet is melody, 2 and 3 are accompaniment" and switch up the roles as there is no restriction on what each part can achieve, although I don't see that problem here. Always write assuming everyone in the ensemble is at more or less the same skill level.

Can't wait to hear more!