When players lose a PvP match they lose stars and eventually rank.
How about instead once Rank is obtained it's done, there is no going back a rank once complete.

Sure subtract the stars gained toward next rank, but stop lowering rank. It's unnecessary and only shows Ubisoft supports cheaters.

For the last 7 days, I been trying to get past Rank 15, but every time I hit it, I get blasted by cheaters using the speed cheat and you can tell when it happens, there's been enough evidence between the forums, facebook and redit only Ubisoft seems oblivious to it.

By letting players keep their rank it gives them a fighting chance to keep striving for those better cards to enhance their decks. Otherwise I bet this game doesn't even last a year because it's seriously flooded with cheaters, the higher the rank, the more there seems to be.

That's my suggestion, hate it or love it; until that is changed, it won't matter how good a game is when it's unplayable. I say that only because Ubisoft thought it a great idea to force PvP in story mode!? Stop penalizing rank, or just take the game off store. There is far better apps than this one.