Capt Crutch

I wouldn't sweat it.

As someone noted above, unless there is some strain (i.e., deflection or movement) in addition to the stress (i.e., weight) such that the weight of the top is bearing where you put your test weight – instead of on the end grain at the top of the leg – nothing is going to break.

The only way it's going to break is if the end grain is not supporting the weight of the top or there's a lateral force (sideways) for example if some drunk fell down and pushed the table sideways and downward at the same time such that the leg was acting as a lever arm.

I would build it the way you are and just make sure that the weight of the table was bearing directly downward on the end grain of the leg. If you wanted to get fancy, you could put in a dowel or groove the top of the leg where the short grain is and glue in a "spline" piece with its long grain perpendicular to the leg, but I probably wouldn't bother.

Real nice looking work, by the way.