I agree with you completely, Martin.I've seen a couple single-driver speakers that sounded quite nice being just a speaker in a box. It's pleasant to listen to them, so I'm all for that. But if a speaker isn't really suited for this, as most aren't, then other solutions might be sought.
I'm in full agreement with you on what solutions I'd explore and what ones I'd probably avoid. I'm not saying that I'm against folks that do it differently than I would. But I am saying that the solutions I've seen you propose are generally the same direction I'd go too.
Wayne