Honestly i dont think it will do anything for your wave. I think it will wash it out if anything.

The rear of the Hull is what is shaping your wave, not the Trim tab. All that trim tab is doing is lifting or sinking the rear of the boat in the water.

The shape of the tab is identical to the hull, this allows the boat to roll over to one side, and when you operate the tab it is just an extension of the hull.

Now if you took out Flat tab and put it on that boat what you would see is the wave would end up with wash, or possible a double lip in the face, or it just might counter act the lean of the boat.