It removes strategy from the equation. It passes for a turn, and turns the match largely into a coin flip.
I prefer it be more consistent.
In the last 3 games, i was hit through cloak on two creatures 4/4 times in one game, and dodged 5/6 in the next. The final game I dodged 4/5. Id clearly been outplayed, but the 50/50 decided it was my turn to win.
Counters exist for cloak. Please change the chance to 75%, or at least 60%, so we can actually put some thought and strategy behind hitting the button - rathen than just a coin flip several times in a row.