If we're talking offence...
Kirk - has always hit, so I think it's safe to assume he will continue to.
Janssen - has had long stretches of very good offence, but has also had a tough time staying healthy.
Vladdy - has had one godly season, and others that have ranged from above average to very good. Is he the godly guy or is it more likely that he's just very good?
Biggio/Merrifield/Espinal - who the f*** knows? Most likely, not a lot there, although Merrifield has had his production in the past.
Bichette - I think we all know what Bichette is. A free swinging streaky hitter who will often frustrate and at other times can lead your team.
Chapman - has shown very good offence in the past but it's been a few years now since those days. I think average to slightly above average is all we should expect.
Varsho - there is potential there to be very very good, but much of it will depend on his ability to limit the Ks and increase the BBs. Above average is where I see him.
Kiermaier - below average offense. He's not here for his offense though.
Springer - above average (if he can stay reasonably healthy).
There is potential for this offense to be very good. However, we can't pretend there aren't question marks all over the diamond as it pertains to production.