He’s had a great year, might even end up historically great. But he could be replaced tomorrow and the Eagles would continue humming along. Bring in the 33rd best RB in the league and that team is hardly different, replace any of MVP level QBs with the 33rd best QB and their team would struggle to even score.
Look at the Dolphins replacing Tua with garbage earlier this year and they were a disaster. Tua (who isn’t even a Top 7 guy) comes back and their offense is instantly back. Nothing Achane (who is amazing) could do while Tua was out