Just as a little tip, Move Tutors are not "third game content". FRLG, prior to release of Emerald, included Move Tutors from Gen I TM list, just like ORAS did. If ORAS had third game Move Tutor content, it would have Generation VI moves as Move Tutors, just like any other Third Version including Black 2 and White 2 did.
End of generation games such as Emerald, B2W2 and HGSS has also introduced new additions to breeding mechanics, which are not present in ORAS.
You are free to make up any justifications you wish to, though.
I am not making up justifications, I am just pointing out the obvious.
You should go to Bulbapedia, just compare the Move Tutors for each game yourself.
ORAS has those extra Move Tutors that only the last game of a generation has, aka third versions content. In fact, they are the *SAME* Move Tutors that BW2 has and BW/XY don´t have (plus 3 additional moves that BW2 didn´t have). So why are you counting them as "third version content Move Tutors" for BW2, but not for ORAS?
Whether there are some new moves from the generation, is irrelevant, I don't understand why you are focusing on that. What matters is that they are the *special* Move Tutors that function with
Battle Points/Shards and only appear in third versions, HGSS, BW2, and OR/AS.
And the final games of previous generations (Emerald, HGSS, BW2) introduced some breeding additions, as you say, but so did the initial pair games before them, so how on Earth is this "third version content" at all? ORAS's breeding addition was to add a second daycare, to double the amount of breeding at the same time, instead of a new breeding mechanic, so ORAS still adds a breeding improvement, just not a mechanical one.
But I don't think breeding additions can be considered "third version content", since those breeding additions in third versions are carried over to the initial pair game of the next generation, so there is nothing "third version exclusive" about them.
Edit: more "third version additional content" shared between BW2 and ORAS are the Join Avenue daily tasks, which return in ORAS, and are done by Secret Pals in Super Secret Bases. The feature was absent from XY and BW. So yeah...