Drawbars should be standard CC’s. Plenty of undefined ones (and the MMA really should define them, as many many different B3 clones exist and all do drawbar codes differently) but sysex is MUCH harder to edit, scale and display.

Want to reduce all drawbars by 10% (perhaps to overdrive the Leslie less), piece of cake in an editor. Want to do the same in a string of hex sysex values? A nightmare! Want to use a VSTi B3 client for replacement? Not possible.

Bad idea, Roland!