I think the problem for both teams is they already hit the peak of what they can do with their roster and coaching staff once and they need to find a new way to invigorate themselves.
Panthers might have it with McCaffrey, since his peak last year coincided with Cam's shoulder problem, but I don't see the Falcons getting back without somehow finding an offensive guru that can get the most out of Ryan and their receivers.
Falcons might legit be looked back upon in 10 years like "they had all these talented players, and somehow they never got it together for more than 1 year? HOW?!" Ryan to Julio is an all world connection that's being wasted.
I mean, the top receivers and their QB's:
Julio has Matt Ryan (3 playoff wins)
Hopkins has Watson (0)
AB has/had Ben (4)
OBJ has Eli (0)
AJ Green has Dalton (0)
I don't think anyone else is in the conversation. Maybe Adams and Rodgers, but that's a stretch for Adams at the moment.
You look at that list, and Julio/Ryan is probably the best combination on there. And they have 1 Super Bowl appearance to show for it and 1 early exit against the later champs Eagles in this current run (not counting '11 and '12). AB and Ben have 1 more appearance and a Super Bowl appearance in Brown's rookie year, but are about as futile and more importantly, that marriage is probably over.
So Ryan/Julio is the only elite connection left and Falcons should make sure to exploit that advantage as long as they have it.