I accept a loss vs Warlock and fortunately not every opponent is a Warlock. Simple as that.
It’s still enough for Legend.
The problem is that Mage is also almost a 100% chance of losing so you can said "is enough for legend" but actually not. Even kibler quit the deck after trying very hard to stick to it and said that the meta is not good for relay on slow decks without inevitability. Which is exactly what spell mage is. Maybe Corrupt priest can have a little more of chances for the surprise factor but is not really that better. You need to understand that 30% of priest power right now is literally getting soul mirror from renew and palmreading or similar high power spells and your opponent dont playing around it. Maybe can literally bea priest just playing removal and keeping 1 big minion without 5 attack on board. That alone make almost any priest hand useless without overkill plays.
i try a lot of different builds, tech cards. There is not way priest is better than mage or warlock. And those are sadly matches that you need to win atleast 1 of 5 times to progress consistenly. Either you play a million of matches per day or just quit priest. High Rank ladder is Way different from gold, plat or diamond. People just spamm the safest deck in those ranks. In legend or high diamond? they try to do other stuff cause surprise factor again but people dont go into one trick surprise deck. They change of deck constanly. In short: nope Priest is not on a good spot.