The card itself is good and every Warlock that's not zoo will probably end up playing Tickatus. The issue itself is that Warlock is not on a good spot at all this expansion. Pure control Warlock is still not good enough. Tickatus, Cascading Disaster and Y'Sharjj are actually amazing tools for this sort of deck but it still needs more support to be able to keep up with the top dogs. Galakrond Warlock is slightly better and still runs this corrupt package but it still lacks the power to even be a "good" tier 3 deck.
If your question is if Tickatus is good, then yeah, he'll see play por sure until he rotates IF Warlock is decent enough. If not then no, Tickatus won't be very useful in that matter.
Warlock has recently been a reactive deck. The issue is right now, warrior does that better against aggressive decks. Warlock is the best anti-control deck right now and will be for as long as Tickatus is in standard. The galakrond warlock + corrupt package was created by me and I dont think that it is tier 3. Tier 2 is a safe bet.