I’d’really appreciate the possibility to play the game offline.
Maybe just the pve game without rewards, anything will do so I can test decks while in a plane or something similar.
Thanks! 
I agree, at least for deck editing, but for story battles would be nice too,
I don’t think we’ll see that one day…
The online play prevents some cheats the offline mode allows, I guess. For example, the server can be the one who choose the cards which are drown. It could prevents from building a perfect draw schema while playing.
Agreed with the above: then no story battles, no rewards at all (maybe just runes?) but something to while away the time while in a plane for instance…