In the current passive setup it isn't, but the crossover slopes are fairly gentle. With steeper crossover slopes on the active crossover, I think the difference will be noticeable.
That's not really how xover slopes work. I mean you CAN end up controlling dispersion with them but ideally you'd just find optimal xover point for various slopes and if tuned neutral while optimizing as much as you can for dispersion, it's probably going to come out pretty much the same no matter the slope steepness.