You are correct, the driving controls in AVP don’t use dwell, that is the wrong (and dangerous) approach. They use something more akin to hover activation.

It’s the hardware I designed coupling the power wheelchair to the AVP, and I’ve driven it myself.

That still doesn't make sense. "improvements... would likely be required before this could ship to larger populations" so what? Are they claiming that everyone everywhere should use this immediately?

"possibility of an accessibility affordance" what do you mean possibility, that is literally the case. Even if it's not perfect (which nothing truly is, obviously), it is undeniably a novel control system for its target audience.

"doesn’t feel right" So your point is simply that your subjective opinion is that it 'doesn't feel right'? What does that even mean? I'm not saying, and the announcement is not saying, that this is some platonic ideal of accessibility controls. Not sure what you are getting at at all.