Dak will be just fine.
But come on now, surely you understand 3-4 days of prep on game week is not the same as weeks (or even months if a division rival) of offseason film dissection.
I'm not worried about Dak, but defensive coordinators are very bright.
It's also true that Dak has more time to study other teams on the schedule, but my guess is he'll spend more time in the offseason working on his actual game,not on specific teams.
Our coaching staff on the other hand, will certainly have been thinking of more and better ways to deploy Dak--and especially against our rivals.
Daks job will be to execute the updates.
I like his odds.