The lines to start the season won't be what we have in the nearish future. Just going back to 18/19 when we had some pretty significant changes, the lines to open the season were bizarre when you know what the actual combos were in the end.
Maroon-ROR-Tarasenko
Schwartz-Schenn-Kyrou
Steen-Bozak-Perron
Barbashev-Thomas-Blais
You can see what the thought process was with some of the decisions, but the bigger point is, you don't really know who has the best in-game chemistry until you get through a decent amount of regular season games. Holloway-Faksa-Joseph might have incredible chemistry, but Holloway could also end up having perfect chemistry with Thomas or maybe he fits with Buchnevich and they short of share center responsibilities. This stuff will sort itself out, but with the amount of changes we have, it'll take some time for things to settle.