Personally, I'd give up a considerable amount to get McGroarty.
I'd give up any prospect we have not named Demidov/Reinbacher along with that Florida/Calgary first round pick.
A potential top-6 of (interchange the players as you wish):
Caufield-Suzuki-Slaf
McGroarty-Dach-Demidov
is a legitimate top-6 for a playoff team and most importantly, those players are all in similar age brackets. Maybe not as much top end talent as I'd want, but still. That would be as good of a top-6 forward group as this franchise has iced since I can remember watching games.