I thought I'd try the MECC.chd and it's pretty cool.
A couple of problems though, on the apple2gs for some reason the auto repeat doesn't work for the arrow keys. The arrow key repeat works fine on the apple2ee. This makes the menu really hard to navigate as you can't get to the bottom of the list without pressing down arrow over and over. I did find that the open-apple or closed-apple plus arrow keys moves by a page in the menu.
And I can't seem to get the apple2gs into the text control panel with ctrl+open apple+escape. I tried everything I could think of, but it just won't go. (I was able to get into the text control panel by holding down closed apple on booting and choosing 1 for control panel)
On the apple2ee the Word Munchers game has all kinds of horizontal glitching on the screen when you're on the word grid. I don't see the horizontal glitching when run on the apple2gs driver.
I'm finding out that I'm not very good at matching the vowel sounds in word munchers. Guess I need some remedial practice.
I'm a bit of a noob with mame and the apple drivers so sorry if these are dumb questions.
Pics of the horizontal glitch on apple2ee on ubuntu 16.04 and mame185 compiled from source: