I used to play with an unloomed ACS on my plated charger, and found it to be decent, but by no means devastating like some people are mentioning here. As soon as I got dehorsed i'd be manically pressing g to drop it or switching ver to my trusty MW BSS, which was getting me out of tight spots with its short length...handy when you've just been dehorsed. ACS (especially at +0) is a horrible melee wep, so don't nerf it.
Anyway, then I saw that every single 1h cav just used ACS with maybe only 10% carrying a 2nd sidearm (some had axes and shit), so I traded some other loom for a MW KAS, which I find to be decent on and off the horse.
Also this talk of 1hitting tincans. Its very rare to be able to do that, and is most likely those fake tincans, who only just meet the armors requirement cos so much agi. Real tincans like Butan (or my own main) can survive easily 3-4 bump slashes.
Play a class more before you cry for nerfs, it's embarrassing.