I dont regret getting rid of my rotor. I have zero jams with the spire, its lighter, smaller profile, and you dont get that loud noise when its empty. Its so quiet. A few of the teams in the UK are switching to them and I havent heard of any issues at all.
I use mine for woodsball and it does me fine. The intial issues with the speed feed have been sorted out with a redesigned one.
I think the rotor has finally met its match.