My univalve sits inside the pole about a foot down from the brush.
I agree that dragging the connection along the floor is a pain.
However, I recently I fitted the slick connect and I have to say it is excellent.
It catches far less than my old protecta ball, and does not come apart.
My stress levels have definitely improved.
I think both products are excellent and, if it were me, for the £60 or so, I would purchase both, fit them and see how you get on.
The worst is, you don't like either and you've blown £60, or resell them. But they could change the way you work!