Of course there is, Leica could have made the winder grip bigger and put a shutter button on top. Like any decent winder from every other mfg. But they didn't, instead they made the garbage one that kicks back and shakes the camera.
Hey.. anyone want mine? Perfect condition - $265 shipped/pp.
And how would the shutter button fire the camera, exactly?
For anything to change on the winder you have to modify the M camera. And this is the biggest no-no in the Leica world. You need at least an electrical contact for your idea to work.
You seem to lack a proper understanding of the major constraints of a M Leica and how the mechanism works. There is absolutely no communication between the body and the winder except the tensional forces.
For any better design of the winder, Leica will have to modify a M camera, thus adding electrics at least. Nobody wants to see a M camera go that route.
I like the winder because, in those situations where I need it it’s a marvelous tool. During blizzards, rainy days, fast paced shooting and so on. For any other time a Leicavit does the job.