I get that you think RAW is super important
Actually, if you had ever looked at my posting history, you would see that I am probably one of the biggest proponents of using house rules with mates to play this game. Tournaments are totally inappropriate to this game to me, specifically because of all the rules problems it has (that comes from almost three years of managing a game store and running tourneys there), and I do agree that GW
writes more of a beer and pretzels game for friends, which generally makes strict RAW
unnecessary if the friends are reasonable and actually interested in each other's fun, rather than beating their faces in.
However, I disagree with the assumption on what the rule was intended to be or that the playtesters some how lend credence to the idea. The fact is, we have no clue what was intended, and the "logic" that was presented lends itself equally well to alternate implementations, so nothing makes the way suggested any more likely than any other concept that would be of equivalence. Any assumption about rule author intent is based on the way we want it to work.
As far as rules discussions online though, RAW
is the only way to actually discuss them, since it's been shown numerous times on the B&C that there's no "common sense agreement" on what RAI actually is.
But as I said playing it as written just means Black knights will never see play in my lists, because they are terrible if they are always -1 to hit.
It's a Stratagem, it can be used once a turn in Matched Play - how in the world does that equate to "terrible if they are always -1 to hit"? That's unnecessary and illogical hyperbole.
It's essentially impossible to make that happen in Matched Play, and I would simply use that Stratagem on a standard RW squad and still Advance and fire with Black Knights as normal. It's very unlikely in most games that you are going to want to use that Stratagem each and every turn and have enough CP to do so, since those are a finite resource. The latter even applies in Narrative Play, possibly even more so, since even with the restriction on Stratagem use per turn lifted, you're unlikely to have enough CP to use on every single RW squad every round unless you are playing some massive points totals or are using minimal RW squads (in which case, is it even really a consideration and the Stratagem is ultimately very situational).