The downside of predicting almost every beat of this encounter is that I have almost nothing to add to this thread 
Yeah, even though this episode still had some awesome surprises, basically Daiba and Rakshas showing they cany do whatever they want, including flying, it's like we talked about it already.
Am I really the first to say RICKERT LAUNCHER! ?
Bravo!

I don't think seeing Griffith next to a full moon changes anything about our understanding of the relationship between the child, him, and the moon.
That being said, it does raise the question of why muddle the issue by showing a full moon at all? I don't have an answer for that, but this episode's ending didnt change anything for me.
On the other hand, I got this mysterious PM on how the ending may change things as far as some of our moonlight boy dogma goes. EXCLUSIVE:
sup griff
hey nice predictions on this chapt-oops lol dont ban me-episode you guys. it was all pretty obvious foreshadowing but guess I cant fool you!
btdubbs let me hear that wereboy theory again...?
https://www.youtube.com/watch?v=bINyQWt4Db4

cheers loser
kintaro
That aside, while this scenario isn't mutually exclusive with the broader ideas connecting Griffith and the boy as you point out (and we've discussed in detail before), it's a reminder there's still a lot more we don't know about the boy than we actually do, especially concerning his nature and how that plays into his probable relation to Griffith and his vessel. Anyway, it's strange to say this minor revelation is mysterious or muddling when the takeaway should be we quite clearly know more now than we thought we did before.
I did however wonder if Griffith ever left his perch from when we last saw him 
He just stands there waiting to make eye contact with anyone that leaves. So needy.

That actually complicates things. The boy isn't an astral projection. He has form and weight. Also, he astrally projects himself to rescue Guts from the sea god. Furthermore if he were a projection, Zodd wouldn't need to be around the rocky cliffs outside Vritannis (the boy also leaves during that time by climbing up a rocky cliff), presumably ferrying him back and forth, before the World Spiral Tree provided a more efficient form of travel.
I'm not saying we know 100% how this all works, but I've yet to encounter a more contvincing alternative, given all the wrinkles present.
So, 99.9%?

It's still a lot of suppositions based on a lack of information, which isn't much for evidence. For all we know, the boy
can physically project himself based off Griffith's power, or something else even (he certainly seemed to appear/disappear at will, and don't forget his unique astral presence). So, again, we should probably let this remind us to still keep our minds open to all the possibilities (like him being tied more to Griffith's spiritual power than his body, and so perhaps the struggle isn't a "seizing control" but the threat of separation and/or independence, which could also explain Zodd trailing the kid... allegedly

). I mean, if you want to talk complications, if Zodd, Griffith's personal bodyguard, is there at the beach and his master's physical vessel is threatened (practically or not), would he not immediately join the fray on a matter of principle? It's not like he cares about spoilers for Guts.

Maybe no, but it's one of those complicating questions we're not asking too hard about.