After some research, it'd probably a very different world. Risto is way below the D-leaders in PP TOI average (0:48 seconds vs. Provorov, Yandle, and York who are all 2:00 or over). With Braun playing above him in the lineup, and a healthy Ellis, Ristolainen is likely playing on the third pairing with Yandle. Yandle is a tire fire this season. With Risto, their corsi or +/- would be abysmal. However... they'd only play 12 minutes a night which is what Yandle is getting even with all PP2 time.
If Ellis is healthy, Risto might be looking at a $2-3M extension or outright free agency... except for that the GM traded for him, therefore Risto is his guy and needs to be extended.
(And yet I still think that if he got to UFA... there's a GM out there somewhere who would sign Risto to $6M/year to be PP2 and be that super tough physical guy who would be a playoff menace.)