Using Apple's Screen Sharing, can I redirect gestures and keys for controlling Spaces to the shared machine?
Not truly a fix, but a possible workaround.

This picture has the remote key assignments to the left, &amp; mine to the right.



By avoiding the same keys for Mission Control itself, I can get to the remote machine's 'screen list' by using  Ctrl ⌃   ↑  at least &amp; click on the one I require.

It's not neat, but it does function.