Dies to Removal

I like SBD if MBD gets less popular, it does look kind of silly against Desecration Demon though, and will just eat a doom blade and roll over. But if MBD turns into Bg or Bw then i think SBD could be quite strong. Against Uw he is obviously a house, i don't know about Esper though, they pack quite a lot of black removal. I'm torn on him, but if the meta develops right he could be nuts.

Reckoner? Well you are the expert, but if Athreos becomes a thing (and i expect it will at least in the early format) i could see the exile from Anger becoming very relevant.

The deck looks solid and i like your argument for O-ring, but it's obviously very hard to make accurate predictions of the meta after JOU.

Don't kill me for suggesting this (I'm just brainstorming), but how about changing the black splash for blue. It gives us turn/burn to handle Ghostdad,BBoV, SBD and active gods (though chained and Banishing light handles the last one as well). Further it would give us various options vs Hexproof. Ætherize, or maybe even Supreme verdict, comes to mind.

As I'm writing this I'm thinking that it will probably hurt the deck more than improve it, but worth thinking about.

I don't know, removing Whip of Erebos or even Unflinching Courage could be quite an important play, and it could also remove Thassa before she becomes a creature.