I admit this is more complicated than the standard system, but that was sort of the intent. I was looking for a more granular system, a little more tactical complexity, a little more realistic combat where things are happening more in parallel rather than in series where combatants finish their entire turn before others get a chance to react to those actions, and honestly I was getting bored of the standard way of doing things and looking for a change of pace. No I have not playtested this yet but that will be the real test as to whether this works or not.
Yeah-I'd say it's ready for playtesting. It's probably not done, but it's done enough to be tested.
Make sure you find a group to test it that likes the added complexity! As I said above, I'm not a fan, which wouldn't make me the best person to test it out. :P