Ok, a couple of quick pictures to address the feet (I know, not audiophile stuff, but important if you're a gigging band and hauling these speakers around).
In summary,
1.) I made some feet extenders (which increased the foot height from nearly nothing to 5/8") and
2.) I moved one of the rear feet to the side edge.
Recall that these things only have one handle - and it's on the opposite side of the newly located rear foot. In the unmodified state, grabbing the handle with any upward force tilts the cabinet so the rear-side corner (where the foot now resides) immediately hits the ground. Surely any used versions of these down the road are likely to have significant damage to the cabinet bottoms and to that corner in particular.
No progress on the other issues I listed previously and I'm actually liking these speakers quite a lot. Glad I got them.