This chapter made me dislike Escanor, he's just too OP, it's not even fun to watch anymore.
I hope that he won't fight any other commandments, he's already manhandled every single one that he's come into contact with.
Pretty certain the author is setting up just how much of a challenge Meliodas is going to have with Estarossa. Shoenen law basically dictates that Estarossa will somehow survive this outcome as Meliodas is the one that has to kill him. As such, the author may be showing us just what sheer power Escanor has, and even that may not be enough to defeat the Commandments entirely, especially once they figure out Escanor's power peaks at noon, then drops.
Furthermore, we learned that there is another tribe that faced the Demon Tribe and their powers were greater, but they were fewer in number. Elizabeth is a possible member of this tribe, the Goddess Tribe. It could be that Escanor too is a member of a god like tribe, born into a human body, which makes the Commandments question his existence as a human as they have never faced a simple human with such powers. Being a being that derives his power off the sun and gets immeasurably powerful, that could very well be the case, and Meliodas may have known for a while. As we learned, these gods were unbelievably powerful, so we may be catching a glimpse of their power in Escanor. Also, we haven't seen all the Commandments abilities, one commandment just may have the perfect ability to counter Escanor's pride, rendering him vulnerable, no matter what time of day it is. Take Monspiet for example. Dude looks like he belongs in upper class, like some sort of noble with the way he carries himself. However, he does everything Derrierie tells him to, a vulgar and selfish Commandment, which could mean Monspiet lacks pride in himself due to his powers that may have a counter for pride itself.