The abilities are good as they are right now, even if spammable over and over. What is not good is their tracking, with most classes in most cases they cannot be dodged as they catch you with the corner of their hitbox.
In short, the tracking is too good, no headbutt or shoulder bash should be a homing missile.
Also if you have such impactful fighting game mechanics in the game, which is great, I hope you also have a few fighting games pros part of your internal testers roster that can help with the overall balance.
U can doge them, but u can punish it only by few heroes and its small risk huge reward.
Warlord has free guard break and with his pushing range he will most likely push you off the ledge or do a lot of damage.
Conqurer shield bash is easy to doge, but usually its used in combo and it has dumb tracking, sometimes it will connect, so again id say no risk with some reward.
Warden higest risk from those 2 classes, but good reward. EDITMet insane warden who thought me how insane it really is... Its top tier ability in the game. )
But for **** sake atleast warden has more than guard break and feints to get trough enemy defenses, compared to Kensei...
And I dont want for devs to NERF them. But I want devs to BUFF other heroes who are lacking...
Its fun to play against those heroes, cos its hard, but its frustrating if ur playing trash tier hero where decent player will **** cos lack of options to outplay them