Has he ever scored thirty? My understanding is that his career high is 24g, though I may be mistaken...
As to the thread as a whole, I'd rather use what few assets we have on the blueline. Crouse is a good player and depth scoring is always appreciated, but doesn't address a glaring need.
So if we look at GP/60 Crouse is at #67 in the NHL this season behind Carcone and above Keller with 1.22/ G/60.
Last year he was at #118 with 1.05 G/60.
Year before that, he was at #128 with 1.06/60.
There's about a 600m gap between him and the highest played forwards. There's about a 2-300m gap between him and our first line players.
Now it's likely that if he played with Keller and Schmaltz he'd probably put up more goals than he is with Bjugstad and Maccelli (not that's a bad line, but it functions mostly as our glue/3rd line). But if we just assume they give him 1st line minutes, he crosses the 30 goal threshold at around 1500ish minutes, which is about top 30 in the league.
He's currently pacing for 28g and 1400 minutes, which is a lot more than he's had any other season. I think it's completely fair to say, considering that he's been around this pace the past 3 seasons and paced for 25+ goals in the last 3 years that he *can* score 30 goals.