I appreciate and do understand your ideas.
From a purely practical standpoint - the setup I described -(the 300L) works very well.
We have tested our arrangement on extremely light (100 gram) models
the ailerons being up to 40% of the total wing area -and on flat wings to boot!
The single driven pair works as well, rolls as rapidly, has no flutter problems - these designs are quite flimsy and very high (for them) speed will induce flutter but low speeds -work perfectly.
These are made from 3--6 mm thick Depron , a firm expnded foam .
We do a lot of initial idea testing with these -cheap and easy to work with -electric powered .
Our larger gasoline models -for this setup will be in the 20 pound region.
Flutter on these occurs readily with poorly setup individual servos -plenty of experience there.
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A hydraulic setup would be nice -I have patents (now expired ) on unique control systems -but from a practical standpoint -not good for models .

The low pressure stabilization idea was not mine -but does appear to work
we have done fixes on rudders which hunt due to oversized aero counterbalances .
by making the trailing edge thicker (from top to bottom along entire t e) the "hunting" is stopped .