At subsonic speeds there is almost no advantage of using tailerons instead of ailevators.
Ailevators may work very well for a low aspect ratio wing design such as yours.
I did try using ailevators on a SIG Somethin Extra simply because I used one servo per elevator half and wanted to to see if there were any gains from using tailevators when torque rolling. As it turned out roll control when using tailerons only was very sluggish in all flight modes. I attribute this to the fact that the rolling torque produced by the tailevators in this case is much smaller than that of the ailerons on the wing simply because there was a big difference in lever arm beween the ailerons and the tailevators.