That would solve the upwind sailing issue, and with a little creative tube bending (picture the handle on many golf carts) it would even be as comfortable under most conditions. Light winds would still present a problem if you want to move your weight towards the middle of the boat.

Downwind, it would be awkward. You want to be in the center of the boat, but the tillers would be centred over each hull.

I would have to do a mockup, but I believe such an arrangement would still interfere with the ability of the rudders to kickup (or raise) with the sail sheeted in tight and the rudders hard over. (The extended tillers would still be under the sail)

A "12" tiller extension (the difference in position between the tiller cross bars on the two rudder systems) does not equalize the boats. Think of a 12" arc centered on the tiller cross bar of the EZ LOC system. It does nothing for upwind sailing and next to nothing for downwind sailing. I have found that a 30" tiller extension just about equalizes the "hand position" for upwind sailing.

Finally, tiller extensions are a known quantity. They are readily available, inexpensive, and easy to install and uninstall. Custom made tillers would be relatively expensive, difficult to install, probably difficult to uninstall, and there is no existing design. Who would want to cut up their factory tillers just so they could enter a regatta? The purpose of my proposal is to open up IWCA racing to as many Wave sailors as possible.