First of all, I don't know if there is a way to know the amount of CCC for and against in a season. There is a screen showing the last 50 matches (Tactics->Analysis or something like that) but that don't cover the whole test league season's 62 matches.
Another thing, this ME and older ME have a very "strange" way of categorize if a chance is CCC or half chance or just a shot. I saw one-on-one chances falling into half chances and shots with two defenders in front of the shooter as CCC.
One last thought, this thread and tactic testing, has the main objective of knowing which tactic get more points in a "fair"/controlled context.
That been said, there is a, IMO, big part of "luck" (as you said) or randomness as we said in the OP, in a regular game on a normal save game. But in this testing league, we (Mr L.) had removed almost all the randomness we could off the game.
I re-tested a couple of tactics just for the sake of, well, testing the testing environment, and they came out with a point difference of +/- 3 points. But, there where some matches that in the first test were a win but in the second were a L and, of course, the other way around. So, its look like the game is somehow compensating that "lucky" win (or lose) the tactic get (with another "lucky" lose or win).
Anyway, thanks for the comment, it gave me food for thought. Hope my answer will make the same to you.
Let there be a variety of good tactics for the newest patch first 
