I really really don't think any of the lances need an angle increase. Spears having the old lancing angle, or a larger one than lances would probably be pretty cool but actual lances are already the strongest horseback weapon in the game by some distance, they do not need a buff (this is all of them, light lance included even though it is never used because the other 2 are better).
I'd go as far as to say the lancing angle being put into the game was the best change in cRPG from native.