Antimode 8033S-II Subwoofer Correction to 250HZ?

When the Dspeaker 8033 was first introduced years ago, there was a gentleman from Finland posting on AVS about how the corrections above 120Hz were not effective; the directionality of the sound would create nodes that changed significantly with just a few inches of microphone movement. Of course it is understood the most significant room effects are at lower frequencies, so it was not a big problem to not have correction above 120Hz.

Now enter the 8033-II with correction up to 250Hz.
Has anything else changed in the product to allow effective corrections above 120Hz?
My biggest confusion is over the question of getting corrections up to 250Hz to a sub getting it's signal after the 8033's 80Hz low pass filter. My assumption is with a 80Hz crossover, corrections between 120-250Hz would have to be sent to the main speakers instead of the sub, but the 8033S-II does not do this.
Am I to believe that corrections up to 250Hz are sent to the sub after the low pass filter, and these outputs from the sub cancel the unwanted nodes and ringing from the output of the main speakers?
Or,
are the problems created from the mains ignored, and the 8033S-II between 120-250Hz corrects only the higher frequency harmonics of the 80Hz and below output coming from the sub?

For someone who has used the 8033-II, have you seen (or heard) any evidence of usefulness between 120-250Hz when used with a sub which is crossed at around 80 Hz?

Yes, I'm

Thanks for the response Beeman. Good point about the ability of many more filters available on the new unit.

My 2.1 system is rather unusual, that's why I left out the details. I do not use Audyssey or an AVR and use only one sub with a fourth order active crossover set to 90Hz with smaller "satellite" speakers. Since I'll be moving to a new home in a year or two, I'd rather wait until then to add a second sub, when I know the room size/shape.

In general, I was looking for a better understanding of how the Antimode 8033S-II signal to the sub cleans up room response that is well above the crossover point.