I haven't touched MTGO in years, but it looks like they removed leagues? (If that's the right name, the sealed events where you could play your matches any time within X days.) Why would they do something like that? The #1 reason I, as an old MTG fanatic, would be more likely to play Hearthstone than MTGO right now is the ability to play whenever I want. I don't have a schedule anymore that lets me set aside 4 hours for playing an online tournament, especially not if half of that time could be spent waiting for the next round.
Are there any tournament formats in MTGO now that allows you to play whenever you want?