The effect of case weight on keyboard feel and sound is known to be generally positive. Heavier the case, more solid feel and deeper sound.
The effect of isolating keyboard plate from the case is, however, not well understood yet but actively being investigated, thanks to recent uptick in interest on gasket-mounting. Appears to be generally positive but, due to wider variety of materials and mechanisms than keyboard case design, overall picture is rather fuzzy at the moment.
The question I have is this: does isolating keyboard plate from the case reduce impact of case weight on the overall keyboard feel and sound?
I suspect the answer is yes, to a degree, but would like to hear what others think.