mn... this "Open Combo System" is actually a fairly good idea, all things considered. my own lazy idea was just for PvE to copy PvP, and GCD WeaponSkills are converted from three buttons, to one button three times... your open combo system concept is more or less a far superior similar approach, I think... ...now that I think of it, your open combo system is similar to how I would re-invent Monk... heh, now I feel like a dummy.. I did not consider that a similar approach would work for any Subclass's combos.
this is such a temptation for me... X'D it word not work in FFXIV, since FFXIV is just a mere glorified action game, but in a RPG setting and in a real RPG game, I could totally come up with 120 different actions, while still being valid and not redundant, in a way that could work out for fairly good in-class diversity.
but back to this lovely piece of work... may I request a sample example?, using the names of Dark Knight WeaponSkils, to give a more in-depth idea of how this would function. I would see fit to check that what I think is the same as what you thought, before I make assumptions, instead. / side-note, I ask because the [Click to Show] link seems to be broken or some thing... when I click on it, all that I see is a big blank empty box, and just a circle with the subtraction symbol on it.