Every season, Ehlers + Scheifele results in a positive (often massively positive) 5v5 goal differential and positive shot metrics.
Every season, Ehlers without Scheifele results in a positive (often massively positive) 5v5 goal differential and positive shot metrics.
Every season, Scheifele without Ehlers results in a negative or breakeven 5v5 goal differential and negative shot metrics.
The net impact of Ehlers over the last 5 seasons, playing with or without Scheifele at 5v5, has been +84 goals (and ~52% average across all the shot metrics: CF, FF, SF, xGF, SCF, HDCF).
The net impact of Scheifele over the last 5 seasons, without Ehlers at 5v5, has been -27 goals (and ~47% across all the shot metrics).
It's going to be pretty difficult to replace Ehlers - as JFresh said on Twitter today, the Jets have probably underutilized Ehlers' prime, they're probably worse off for trading him, and they're not going to get back the return they should for a player with his kind of impact.
Yeah, yeah, Ehlers has been bad in the playoffs...but do the Jets even make the playoffs in 2020, 2021 and 2023 without him? Even this year, the Jets' #1C was +0 at 5v5 without Ehlers.