As a total beginner, I have the COL2 & 5, and they're fantastic. A great way to learn, be inspired, etc. And I like having a few non-poi arts sprinkled through it - in case we're not familiar with other stuff going on. But I agree that it makes sense to keep the focus on poi in the "Home of Poi" videos. Maybe I'm not remembering correctly, but I don't recall much glowstick/ball/lights stuff, which I would very much like to see.
I know it's difficult to get legal clearances for music, but my one suggestion would be to either require people to submit with music, or give them choices - like here are the 10 tracks we have, you must use one - because when the routine doesn't fit the music, it's distracting and/or irritating.
Really glad you're going to do another one!

(I always misremember the name as Carnival of Light, anyway, so I'm okay with changing the name.)