As of this moment, I would say yes, it's a bit premature. If he repeats last season this season... hard to say no.
I'd say he's in the pool of players that have the potential to be core pieces in the next few years. Kirk, Jansen, Biggio, Manoah and then Moreno are probably all in that pool for me. Pearson also but to a lesser extent, he's more of a fringe core guy.
Romano would be too if I didn't have an irrational hatred of relievers in general