This was a great chapter and finale to this little arc.
Deep down, the "two" Escanor's are the same, with their love for Merlin being a clear connection. I'm pretty sure that link is going to be the key in him "controlling" his second half. While that link is shared, the difference between the two is literally night and day. Which bring me to Merlin's comment this chapter. Which Escanor is the true Escanor? Was he cursed with his strong form? Or, was he actually cursed with his weak form? It's most likely the former, but it's something to be considered. His backstory will be interesting. Curious as to how he'll look when it's noon.
"Sunshine" is an interesting ability. The heat is an aspect of course, but Merlin's comment about it being the source of life is also and interesting idea. Vampires are undead being, so we could look at the Vampire King in this chapter being destroyed by "Life". Also interesting that it was compared to the Demon's Purgatory Fire. If Escanor truly was cursed by the Goddess Clan, then the Goddesses and the Demons might be two sides of the same coin, despite their apparent dislike of each other. I wonder who truly started this war.
The rest of the chapter wasn't as interesting, but interesting points were brought up. We have another case of a demon in "love" or, at the very least, showing emotions and attachment.