2019-20, Ryan Strome had 59 points. 33 of those, Panarin was involved. He had 18 goals in back to back seasons, one with and one without Panarin. Only 11 of his 45 assists where on Panarin goals.
Now, if you want to make the case that Strome has benefited from playing with Panarin, I am sure nobody would argue with you. But Panarin is signed for 6 more years. He isn't going anywhere. Stroms for 2-3 years at ~5m AAV is fine. IMO he is another Brassard. A guy who can support better players rather than carrying his line. Having Strome on the team gives us the luxury of splitting up Panarin and Zibanejad.
Unless someone is really convinced Chytil can put up 50+ points playing with Panarin, I really don't see a reason to jettison Strome just yet.