Hi Sunny

First of all, I can't possibly imagine who would want to play a song and then play another song the same speed unless you were doing disco or dance all night and had it set to 120

Anyway, if you want to you can easily set the speed of any style and save it different than the default speed.

As far as speed, the tempo buttons are right there in plain view and easy to get at and operate. If for some reason one would want to use the data entry wheel for speed, all you have to do is touch the tempo buttons and the data wheel then works for tempo. It is a quick access multi function control.

I don't think Yamaha needs to change anything about this at all, IMHO

Scott