We don't need him on the PP. There's an open spot with Strome gone, but Strome contributed almost nothing to the PP and we were still one of the best in the league. We have plenty of guys to take that spot who can do just as well, if not better.
Miller led his team in SHTOI/GP among forwards. Vancouver was tied for 2nd worst PK in the league. And despite all that PK time, he only had 2 SH points all year. We don't need him on the PK either.
Miller played 15:41 per game at even strength. On the Rangers, only Panarin got more. Mika was almost a full minute less.
Miller would not get the same ice time here as he does in Vancouver and he would not be as good. He will also cost more than he's worth and we won't have the cap space to re-sign him to a contract he also won't be worth.