Well, let's be honest... he REALLY doesn't have that much to gain from beating Alexander.
If/when he beats Tito, he should imo get a title shot.
If he instead goes and beats Alexander, so what? He was the first skilled "grappler" to fight him, we knew it was gonna happen (I did anyway
).
I don't think a win over Alexander would earn him a title shot. Houston's still somewhat untested and doesn't have the name recognition Tito has.