I've been staying away from Veilguard news, but while disappꦅointed this doesn't surprise me. Importable world states means any story would have to account for all possible past events. It creates a lot of work (and potentially more bugs!).

By canonising certain events, from the comics we know Alistair is 🐻king and Sten the new Arishok, it allows the writers to continue a more focused narrative. As long as the writing is good, which I saw was one of BioWare's strongest points, this isn't necessarily a bad thing.