Well, to go back to Federation Commander (which I seem to do quite often these days) the only fighters in the "vanilla" game are Stinger-2s (in the Main Era, Stinger-1s in the Middle Years), and even then only on a casual basis (i.e. no true carriers). As you say, Stingers are a staple of Hydran doctrine, so they had to be in; though ships tend to have a few less fighters per class than in SFB.
Now, there has been talk of doing a product called Borders of Madness, in which things like strike carriers would have a place, while still being kept apart from FC proper. The thing is, even this compromise is not universally popular; while it looks fine on paper, no-one is exactly sure how things might go if certain game groups decide that they want to keep BoM out, while others might insist on it, and thus lead to a splintering of the fanbase.
Now, that might not be the case here (or, indeed, in the FC community; I'd like to think things can be managed amicably even if BoM goes ahead as a product); but I fully expect that kind of question to come up if the day comes that Mongoose pause to consider whether or not opening the floodgates to attrition units (even on an optional basis) will be good for ACtA:SF in the long run.