I think Blizzard could rework Tickatus into one of these:
Battlecry: Remove the top 5 cards from your opponent's deck. No corruption effect, no demon tag. It would be easier to play (even against faster decks), but limited to burning only 5 random cards per game.
Leave corruption as it is, but instead of burning 5 random cards, make it: Discover card from your opponent's deck and then remove it. Repeat 3 times. Less cards to burn, but in more controlled, aimed way.