Could say that about any season. They finished 2nd in yards and 3rd in points, which maintained the standard the team had set offensively. They did it in a season of turmoil where I think few people would have been shocked had the bottom completely fallen out. Carmichael has been good on other occasions, too, and obviously won over Payton's trust, and the organization's trust, to have stuck around all this time.
Mostly, though, I'm waiting to see what he can do with the roster he has this year. I completely soured on Dalton pretty early into last season and I expect Carr to be a meaningful upgrade. I'm optimistic about WR, TE, and RB and keeping fingers crossed about the OL.