I hear you, it is a lot of change and is likely unrealistic / not gonna happen.
The reason I suggest it is mainly tied to my belief that if Kakko on the Strome line was going to happen, it would have already. Both Quinn and Gallant tried it and moved away from it. I get the sense that Panarin and Strome do not like playing with Kakko and have likely voiced that. There was seemingly informed speculation to that end from Carp last year, and Edge dropped a cryptic post hinting at similar in the Kakko thread recently.
Therefore, Kakko is on the 3rd line. Lehkonen is on the 3rd line. One of Goodrow/Hunt is with Panarin and Strome. If it is Hunt, Goodrow is 3C. But if it is Goodrow up with Panarin and Strome, you are left with either Barron/Chytil anchoring the 3rd unit, and depending on how either look down the stretch that could be a critical weakness. Depends on how they feel about Barron/Chytil being next man up for that role. But probably too far down the line of priorities to give up what Copp would cost if he is even available.