The thing about the waves off the back of the driver is that they have an output that is equal to the output into your room. The usual way to deal with that is add MDF bracing upon bracing which adds weight and more weight which lowers the resonance and makes the problem worse. High resonance is much easier to deal with. Ping on a wine glass, to shut it down you merely touch it with your finger. That won't happen when you rap on a larger and heavier pan for example. Take out the 12" woofer from a speaker and you can see how vulnerable they are.
Ideally to deal with resonance a speaker should be small and light. Or as small as possible and still maintain enough volume to load the drivers.
So in effect a plea for small(er) speakers? Resonances of higher frequencies may be easier to deal with, but where present are potentially more obtrusively audible, or? What about the shortcomings of small speakers as going by their limited radiation area and SPL capabilities (not as a means of max. SPL per se, but rather their ease of reproduction at more "normal" listening levels)? Sheer impact, physicality and emotional connection would go by the wayside, as I see it, if small and low sensitivity was all there ever was. What then is ultimately won?