That looks nice and beefy. I think that should work a lot better.
Just thinking out loud. It seems that the ideal would be the clamp part just holding the router to the main part, and the main part should be working to hold the tool up and holding the dust shoe on. I see there is a lip on the clamp. It would be better if that was on the main side. I don’t know how to make the dust shoe attachment go to the main side, but that would help as well.