At his age and just being a pitcher, you have to have some worry Max can't stay healthy and/or starts to see a significant drop in his stuff. But that worry is about as small as can be.
Corbin may not quite duplicate last year's amazing numbers, but so long as he stays healthy, he's going to be really good.
Stras seems to have a rollercoaster with health, and I kind of think he's due to figure out how to make at least 28 healthy starts this year. I don't know that he'll ever, at 30, become what Max has been year in and year out, but I think in the next few years he could still put together that 1 monster Cy Young-type season.
I think Anibal and Hellickson can be pretty steady on the back-end. We've seen some guys, like say Charlie Morton, have these resurgences in their mid-30s by getting healthy and refining their pitch mix. If our 1-4 guys are doing what they can, then Hellickson can remain and 5 and dive guy and we should have a bullpen capable of handling the extra work load.