Darn, I like your philosophy. I also like your system. Please explain what you mean by, "actively configured"? The only thing I do not like is running the 15" woofer up to 600 Hz. I assume this is because of the horn's low frequency cut off. I would use a very high order cross. Minimizing room interaction by limiting dispersion is a very important concept. Omni Directionality is a problematic attribute as it maximizes room interaction. You "hear" the room which destroys the impression that you are in a large space. It is also much harder to achieve controlled directionality and not overdo it and limit reasonable listening positions. Horns are really good at limiting dispersion without overdoing it.
You have a full frequency, limited dispersion point source system. I have a full frequency, limited dispersion line source system. I also configure everything "actively", by which I mean all crossovers and processing are done digitally and each driver or transformer has its own amplifier. I would love to be able to compare the two systems.