I think Dak will be better this season than last, certainly better than the inconsistent mess he was over the last 8 or so games. A torn ACL is one thing, they aren't as serious anymore and guys seem to bounce back from them pretty easily, but an injury as serious as Dak's still warrants the "takes a full year of playing" before being back to normal label.
I'm hopeful that we'll see an even better version of the Dak we saw over the first half of the year where he roasted the Patriots defense up an down the field.