Devers's dough went to Anthony and Crochet. The question is where does the savings from Bregman, Giolito, Chapman, Buehler, Hendriks, Matz, Wilson and Refsnyder go? That's 68M for 5ish guys who have to be re-signed or replaced.
The list also shows the amount of injuries inflicted upon an MLB rotation. You can't just rely on 5 guys.
I wouldn't count your chickens on Kyle Harrison being anywhere near the rotation. Traded? Pen? Those two options could be just as likely if not more.
I'm not saying he won't be good, I'm just saying that there's a chance it's not an ace level performance. He could also come out and blow the doors off the Buccos.