I think I phrased it "less foot movement" with the Kubota. Both arrangements require some movement of the foot, but I find it's less on the Kubota.
On my Deere, when I go from forward to reverse, the motion is: pivot toe upward, move heel sideways to the right, pivot toe downward. Do that a lot and it's like a one-footed dance move.
On the Kubota, all the motion is front to back, and can be combined into what ends up being a knee pivot followed by a toe stomp or a heel stomp. Everything is inline and more natural to me.
From what I read, I don't think that would change the issue you had with the Kubota treadle or the preference for the Deere pedals. You seemed to have issues with the movement and effort required by the Kubota treadle, not the overall amount of movement.
You could certainly adjust the centering-spring on the Kubota treadle to require less effort, but that would then mean the HST would be a lot slower to return to neutral/stop after you let off from forward or reverse. That could be borderline dangerous. The spring is there (in conjunction with a damper to control the rate) to re-center the treadle for proper, safe, and smooth return to neutral/stop. It's not meant to be adjusted for operator effort.