Since the last update (o/a 14 Jun 2017) I can't access my collection offline (without signing in). Anybody else experiencing this? Was a purposeful change (God I hope not, offline access to the collection was the best remaining feature of MTGO)?

Apparently it was purposeful. From the ORCs:



Does this affect anybody else?

I didn't know that offline access was possible. On the rare occasions that I want to analyze my collection outside the game, I export it to a CSV.

I did know, but I don't miss it.

Well, it was simply when you launched the client, you could go to the collection screen without signing in.

For somebody like me, who travels a great deal and does not always have internet when doing so (either en route and occasionally at the destination), being able to build decks offline is critical to being able to play when I can get online. Otherwise I need to spend a lot of my sparse online time building and updating decks.