I'd sure hope that fighting games, which actually do use use direction blocking (low, mid, high, grab), would take skill, given that they're widely acclaimed as the genre with the highest skill requirement and ceiling. But fighting games are also doing the directional blocking in an environment where you have 7 frames to react or you potentially lose half your health, and there's over twenty characters all with over potentially sixty different moves in their moveset you need to know how to prep for.
Freeform directional blocking and swinging have fairly weak skill requirements and limited room for growth. They're both easily mastered within a couple of days of game release as long as you don't have a horrid reaction time. Mordhau made that pretty obvious, given how quickly the complaints in the game centered around chamber/feint spamming being the only method of hurting someone, and even they were blocked on reaction at higher levels. The 'skill' in freeform combat is entirely based around how cheesy the feint mechanic is, or, in Chiv's case, how much you can cripple your own character to hit the enemy from a weird angle. Even in the rare instance that the freeform game allows you to make your attacks hit earlier or later depending on whether the opponent's on the edge of the screen or in the middle, it makes no difference once people are blocking on reaction.
Skill comes from understanding of footsies, frame data, knowing and linking combos, abusing recovery frames, timing, matchups, understanding of your moveset versus your opponent's moveset, and knowing what move's going to pop up when you input it. In CoE's case, basically all of these will be covered, albeit the last is more about knowing at what point in your combo is the overhead attack, heavy attack, or whatever special attack (no idea if super armour exists, for example), as well as knowing how to get to that and when it's safe to do it. Conversely, freeform combat involves almost none of them. Almost every freeform game comes down to reactionary blocking until one side gets bored and does something dumb, and even using movement ends up being placebo.