Yeah, at this point I would say the only option would be to raise the off threshold on the pads. That way the pad will be considered to be "off" at a higher pressure. The problem with this is that the on threshold always has to be higher than the off threshold, so it's a bit of a balancing game. Good old hysteresis.
It might be possible to do what you want with an update to the firmware, but I'm not too sure if we'll go this route. Most other pad controllers can't do this (or if they could, they don't) — definitely can't do it with the Akai's and the Maschine. Having played with pad controllers for a number of years, I find most people just get used to learning to snap their hands back really fast after striking a pad.
It could also be potentially tricky to deal with second hits vs. changing pressure. If pads allow for triggers even when held down by another finger we'd need to devise a way to distinguish between whether or not a pad was actually struck or there was just a quick change in pressure from the first finger that struck the pad. Could get difficult. But maybe not, we'll see.
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