Indeed. Except that “cross-media continuity” does not necessarily need direct tie-ins (or any reference at all).
Unless the creators say something is supposed to be alternate universe, it is to be considered same universe and continuity by default.
Yes, EQG by necessity has stuff from the show crossover into it, that how spinoffs work. So far the only crossovers from the spinoff into the show was Flash Sentry’s two appearances.
Side note, there was mention of Ponypalooza from a book, and the From the Shadows comic arc will tie in this season, so they’ve set precedents for cross-media continuity.
Sorry, but you’re never going to convince me the very end of Friendship Games didn’t have something to do with the Season 5 finale of FIM when Twilight mentioned that “Time Travel Loop” So to me EQG and FIM are connected in some way. Don’t try to tell me otherwise.