I don't know if you'll find this information useful, but I thought I'd put it out there, anyway...
The last time we did a mid-week MM,
Disneyland was much busier than it was on ANY of the other 4 weekdays we were there. We'd woken up at 4:30am in order to be in line by 6am, for a 7am MM. We were first at the turnstile we got in line at.
After all that effort, our wait for PP was 3x longer than it was on ALL of the other mornings that we opened at DL...making us later to all subsequent rides as a result. We got quite a bit
less done in that MM hour than we were able to do during the 1st hour of all the other days we opened at DL. It was SO disappointing...all that effort (we were traveling with extended family, so we had to get 10 people - including 6 kids - up at 4:30am to go wait in line for an hour on an unseasonably cold Summer morning..), just to contend with HEAVIER than usual morning crowds. I was bummed.
My best guess was that *possibly* people are just getting more savvy overall with their DLR planning in order to avoid heavy crowds and extra-long lines...and as a result, more people are taking advantage of MM...possibly tipping the tables the other way?
I don't know for certain

. However, after that experience and reading posts since then from other people that have had similar experiences...we're probably not going to bother with MM anymore. We'll just open at DCA on MM days.