Monogatari series complete...for now. That ending was far more complete than I thought it would be and honestly I couldn't have hoped for better. Time for spoilers from owarimonogatari season 2 and really the whole series.
I am a fucking prophet! Dream span DID revive both araragi and hachikuji and she DID end up becoming the god of shirahebi shrine. I had also surmised that ougi was an oddity that araragi was responsible for but I didn't get it exactly right. The trees also had nothing to do with anything yet. I figured ougi would end up getting saved (although hana kinda gives that away). Considering kizu did basically nothing to resolve araragi's arc I'm glad ougi was that resolution instead. Looking back its painfully obvious that she had to be. I mentioned how only two characters arcs were left at the end of season 2 and no surprise shinobu's was handled in kizu mostly and then wrapped up in owari 2 and all of final season was araragi.
Oh I was also wrong about the original shrine location but I was right about shinobu being the original god way back when. It was nice to see senjougahara spend time with araragi again. Looking more deeply at the snake metaphor of death and rebirth thats exactly how the seasons go. Season 1 is birth where we are introduced to all the characters, season 2 is death where we lose most of the characters and araragi ends up "alone" and season 3 is rebirth where everyone gets brought back and it literally fucking says they live happily ever after.
Spoilers over. I think my watch order was ALMOST ideal. Watching kizu before owari 2 does seem like the best place but it would also be fine going before neko black. The one thing I would change is I would watch hana in LN release order which is right after kabukimono. It makes the events of otori have a different and IMO awful connotation that wasn't originally intended by nisioisin and I think that was one of the reasons I ended up disliking season 2 so much. With the context of hana and final season, season 2 was actually not bad and koi is even better after watching hana (which SHOULD be information the viewer already has in LN order).
I shouldn't really say this without more time to think on it but my initial impressions after finishing this is that it's my favorite anime series of all time. I'm glad SHAFT will continue to adapt it supposedly forever.
About hana- watch order nuance; Like I said before, Shaft had to cut out an arc from second season because it wouldn't fit otherwise in TV broadcast. Though, I think they did a really good job doing what they had to do, so either way is fine by me Hana was the ideal arc to cut out because it made the "breakthrough" of Kaiki's character in Koimonogatari and his personal cliffhanger really amazing, and it wouldn't work out as well if Hana was seen beforehand. That said, I'm biased from the first experience, and that Koimonogatari was my favorite arc. ---
Your palace may last forever, but my yurt can go anywhere.