I have experimented with the mouse and keyboard controls and yeah, it is controller only cause for some reason mashing attack with dodge still makes you move unlike the controller which doesn't move you when done correctly.

For some tech that I use on runs, I'm doing something I'll call "attack canceling" where I press attack and then mash attack + dodge so I get invincibility and faster sword and dual knife attacks. This is usable on bosses except for the Wailing Mines one.