Not sure why this is a problem if the result is vastly superior performance.
I found that replacing the analog crossovers on my MartinLogan Monoliths with an active crossover, and later a full digital speaker processor (DBX DriveRack 4800) to produce dramatic (both subjective and objective measured) improvements.
Even analog active crossovers, while much preferred over analog passive crossovers, are still pretty far behind what a good speaker processor can do. for instance panel to woofer delay is not possible, yet due to the variances in drivers and relative positioning, one typically needs delay to one element or the other to time-align the impulses.
Every time I've heard the 10B demo Sanders Sound Systems does, I'm quite impressed. So even the cheap crossover they use for the demos is up to the task. But I would bet that going to a DriveRack would yield even better results.