Why not trying special format for MTG - where each player playing with 2 decks (one with lands and one with playable cards) instead tradicional one deck (where lands and playable cards mixed).
For example - instead one deck with 60 cards, player have 2 decks: one deck with 24 cards (only lands), and one deck with non-land 36 cards. When player draw, scry, search, surveil, etc - he choose deck as wish (and after this draw/look/shuffle chosen deck). When player take start hand - he take whole cards from both decks, in combination he want (2 land+5non-land, or 1 land+6 non-land, etc) and after this look them and deside for take mulligan or not.
Split Deck format resolve tradicional flood and manascrew problems of MTG. And separated deck idea better for casual digital BO1 - both players have high chances not lose game from start. See on Heartstone, where new manasource is garanteed each turn. Why you take bad from Heartstone (alchemy, with crasy random mechanics) and not take good part.
Well, some cards looks overpowered for this format and, maybe, will be banned or rebalanced for this. But it will be very interesting format - maybe for another game, not MTG, but simple new MTG-clone or something like that. Maybe this format needs his own allowed card-list instead bans - his own mini-blocks based on exist MTG-cards, his own releases with new allowed cards. Why not?
So, this format can being just special mode for MTG Arena (and it will be better than brainless Momir, etc.)