Have you tried manipulating uke a bit more at 90 instead of stopping his spin with your left hand

Going for a kick or punch on the torso or groin rather than just a decap will look better and make it far easier to transition into the pose because you don't have to worry about Uke falling on top of you

EDIT: Attatched an edit where I kinda continue the thing

It's not very good but eh, just an idea of what you could do