Its a long shot but...
Why not add a the ability to controll each sub wirelessly?
Rather than tweaking through the reciever each subs output could be controlled through an app on a cell or tablet.
This would be for the fine controll you would otherwise have to set at each sub in the initial setup.

My $0.02 - don't really want to pay for that feature. I'm happy to get up off the couch and adjust individual sub gain in the unlikely event that is necessary. I mean really, once you've got your subs dialed in, how often do you need to INDEPENDENTLY adjust them?

Until I started reading older posts I thought my system sounded about as good as it could.
After picking up some good pointers it now sounds better.
It will sound better once again after I fine tune eachs subs output.
I thought it would be nice if it could be done from my chair.
Theres an app for nearly everything else, why not independant sub control?
Just an idea.

Well, the "why not" is that it would cost extra, add to the technical complexity and be rarely used. I don't disagree that - in a perfect world - it would be a cool feature. My objection is that - for a company like Axiom - adding that complexity would compromise the value proposition for little benefit in sales or usability.

In terms of volume adjustment, all I want is some demarcations around the dial. Then I can write down where I have it pointed and be able to adjust the vol on the sub at will without worrying that I'm screwing up the calibration.

I adjust my subs once during calibration and never touch them again. Demarcations around the dial is a great idea.

I agree to the demarking and ideally positive feedback from the dial confiming the fixed setting.
Axiom is already looking at the technology with their airplay speakers.
I find the adjustment to be very sensitve on my current subs. If a fixed value was displayed on my cells screen and I could change it from my seat I'd be happier.
Generally speaking I don't change the subs settings after they're placed. Having the choice from the convenience of my sweetspot would be nice.

I would prefer a way to adjust the sub's volume (cringe), that doesn't involve a knob on the backside, which is usually shoved up against something. Say, maybe on a side, with a knob that doesn't stick out far, like maybe a flush mount you'd turn with your thumb.

Good point, Brian. I've noticed that feature on a couple of subs where the gain is on the front...I like that idea.

Nothing.