This is pretty much one of the best builds I've seen so far that takes into consideration proven elements of the game such as how fucking useless weapon master is, and is a solid, stable build for pure lance cavalry.
Looks like I'm going back to cavalry next generation with this build.
WM is far from useless in general. However WM is not needed to become the best melee (lance or 1h) cavalry player of crpg.
But if you want to be able to compete with the best of 2H players on foot as well, you really need those extra points in WM, not just athletics.
Also, don't forget that WM adds quite a lot of damage.
Anyway, it all comes down to personal preference and playstyle in the end.
Personally I want to be able to do well both from horseback and dismounted.
OT:
Fraemi seems to run some script that automatically gives me -1 on all posts. Can some admin deal with it? It's kind of annoying.