I'm not one to react to small samples or change my opinion based on one or two viewings, so I don't really see any reason to think this team is going to be anything other than very, very good this year.
The only real concerning thing that I see so far is Bassitt's velocity. Manoah will be fine. Gausman looked like himself. I still think Berrios settles in and will be ok (at least he generated plenty of swing and miss yesterday). Kikuchi... I have no idea what to think there. Hopefully it goes well.
The offense has looked good (great approach, great swing decisions, solid contact) despite not being able to come up with the big hits once they get runners on, but that'll turn around. It wasn't some inherent flaw when they struggled with it for two months last year, and it sure as hell isn't through 4 games this year.