Kled's E is pretty much what should have been in Hecarims kit in some kind of way.
When fighting while riding you usually have two possibilities. Either go for the crash like
does with her fat hyper-boar or you try to slash/strike your enemy while passing by like Kled does now.
However, we already have one 100% cavallery champion in the game. One that is at least 50% dead horse. 
Sure, he already has the crushing and charging parts done (I really, really like his ult), but the rest feels kinda clunky as he is kind of an old champ. The first time you see Hecarim and his weapon you know exactly how this guy is going to play. Either you get sliced while he rushes past you or you get trampled by half a ton of undead horse. However, his current gameplay is not exactly living up to that vision, especially when crushing into enemies with the charge is kinda... weird at times.
I think Hecarim as the unique cavallery character should be the champion that should have two playstyles to his disposal: either going for a tank/disruptor (charging and crushing) or going for a brawler/fighter when building more AD (slicing while passing by).
Comeon Riot, I know you want to give the undead pony some love too.