Oh, and skimming through the forums revealed that some players fight by circle-strafing their opponent while holding block (right-click), so for them dodging is just tapping space; this could be a reasonable alternative, if it suits your playstyle.

Personally, I use movement and parrying, rather than holding block, so the method described above doesn't work for me. It makes dodging feel... clunky... because I'm not already holding right-click; I'm concentrating on the proper block timing to parry the blows, and holding block constantly means you're moving much less quickly. To get to the point: I understand completely why one might wish to use a macro to press a 3-key combination that should be a single button.

For example, many games use "double-tap a movement key" to dodge... or for that matter, ALT is unused; why not bind the "dodge" action to that?

Then again, keybinds in Unity are a real chore on the developer side, last I checked (although it's been a few years since I touched that engine)... perhaps it was simply too painful to implement on a "modifier" key?