He was playing with a broken orbital bone and the team around him is not ideal. Embiid's best hope is next year. The best-case scenario is Harden picks up his extension and takes the season seriously and comes in his best shape playing for that next contract.
I would definitely pay Embiid, Jokic, and Bam (if you want to count him as a center) a max contract. Hopefully, the Suns would. Centers like Gobert, Ayton, Allen, Time Lord, etc. are all very good and raise their team's floor, but once they are making max $, they also present a lower ceiling.