Yeah, I agree. Think they're over playing the Nina. PDO is factored too . Highly doubt NEPAC SST'S are factored at all. Medium range continues to show cooling in that area so, who knows, maybe that's being further extrapolated by Seasonals. Due to that possibility, they could be extrapolating the WPO and EPO as well now. That would all favor pretty solid mildness as the WPAC is still very warm and medium range continues that pretty stable.
There are also signs of the MJO hanging around P 6-7 mainly according to LR Guidance. So, SST extrapolation being factored irt that.
I don't think the NATL SST'S are factored any at all at this Juncture by LR's. Maybe they do now. If so, I'd wager not highly factored.