This is really cool! I would say though that the auto-created groups move themselves to the far left when a tab is added, overriding the manual placement of a manual group.
I drive a 2013 Ford Focus and have had the transmission serviced twice in the 26k miles its been driven. There's at least a 1-2 second delay in acceleration lag when I need to accelerate quickly; and it's gotten to the point where I consciously try to avoid those situations. I guess it has made me a more cautious driver, if I want to look on the bright side.
Luckily, I've never had it slip into neutral on the highway or randomly accelerate, but I have had it refuse to shift into a higher gear while getting onto the freeway. The issue would only resolve once I pulled to the side of the road and completely turned off the car and started it back up.
Definitely going to replace the car once it's paid off in January.