Why not try experimenting with it, Werd and get back to us on how it works out?
This reminds me of a couple of years ago (and i posted this here) i discovered a new type of mono soundstage.
I had a tweeter go on my Zens. Sent it back and got another one in the mail. While waiting i was stuck with my left side tweeter-less. Of course i am going to listen to it. What i found interesting was how it didn't sound that bad. One tweeter could work if you can get it to display all the music information. The only way to do that was by using a mono signal. Using my Carver c2 preamp (set to mono) i went further and seen how i could improve it. I basically spent time trying to get the image to work better by moving the speakers around. Further away then closer kind of thing.
The thing that made it troubling was the tendency to listen to the left side. The tweeter- less side. It stuck out like a sore thumb then it occurred to me - there it is that's the solution. Concentrate on the tweeter less side. It sounds easy but what it meant was unraveling the embedded stubborn tendency to listen for the stereo image and concentrate on the one side. You need to listen to each speaker individually. Complete opposite of listening to a stereo image between the speakers. .
What eventually emerged was a mono image at the tweeter less side while the right speaker rained in high frequency tweeter info. It took awhile to hear it. And instead of symetry in cabling it helped to hear the speakers individually by using different cables on each side.
Using a different bass drivers might help to but dam thats a lot of engineering. I aint got that ability in speaker building to do.