Well I played HA after the patch and it is still playable. You deal like no dmg but it is playable (with the right build tbh). When ur build is like 15:27 u won't have sucess^^
You need agi to be a rider, and you need str to be an archer, so you need a perfect balance of both, but that ends up making you a half-assed archer and rider, making you very very meh. So yeah, HA needs a major buff, like, give them pinpoint accuracy so they hit every time. And they should be really fast so they can easliy run away from other cav.