He's playing 15:55 right now with Tye Karte and Branden Tanev, including PK time and no PP time, I think his numbers would look drastically different with Giroux and Batherson. His linemates have combined for 10 goals and 20 points, Norris' have combined for 22 goals and 60 points
He's got 6g and 10a at ES in 35 games, Norris has 8g and 4a in 38 games. At ES Gourde is playing more time at ES than Norris with 13:40 compared to Norris' 13:15, and is getting similar, if not tougher, deployment on the ice with 39% OZ start for Gourde, 41% OZ start for Norris along with playing on their shutdown line.
If we gave Gourde both Giroux and Batherson as linemates, he would absolutely be keeping up offensively with Norris, right in that 40-55 point range, and he doesn't need to replace Norris on the top PP as he's kind of redundant as is with a strong unit of Bath/Stu/Tkachuk all doing the brunt of the work, and both Giroux and Pinto on the 2nd unit. Switch out Norris with Pinto or Giroux and I'd wager our PP would be clicking along just as well with all the other guys still in the 15+ PP points range they are currently in.
I don't think the team would be in a much different spot switching out Norris with one of the rental middle 6 C options that will be available.