I like hiltslashing, the problem with the way melee has become now is purely to do with "range control". Which consists of one player holding their s key and the other having to run at them, yielding the s-walker rather easy kills especially if they have moderate kick-slash skills. Some would actually call this footwork, but I am against this kind of duelling. Actual range control is where each duellist will move away from swing range and immediately re-enter, and then swing/stab, but this should never be your only duel tactic.
On topic though; I have noticed no change to the right swing. It should actually be slower than the left swing, it says that in the warband manual- even though a lot of stuff in there is no longer relevant. If there is a change, revert, but for now I see no difference so I would not be too bothered by it for the moment.