Yeah, I should have said referenced, as it doesn't appear to repeat any information from MP. I do think that we'll see more weapon specialization multi-class powers in MP and maybe something like the Arena Fighting feats.
It may function like Furious Smash, but with a shift of some sort.So this makes both Viper strike and Wolf Pack Tactics obsolete?

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.