The most interesting of these three new spoilers is Deadly Dispute, reskinned as Baron Rivalry, detailing a story moment from Final Fantasy IV
Air Magic
It's far too one-dimensional to play, and even when it's in full flow, each sacrifice or life gain just sets off a sequence of events that you need to resolve over and over again, but many aren't all that interesting to deal with
Sword of Feast and Famine (Untap Artifact) As well as giving your creature +2/+2 and protection from black and green, [c]Sword of Feast and Famine[/c] also untaps all lands you control
If the rules allowed both sides of the card to give you access to the cards the other had exiled, I might be more excited about these two being on the field together but as I understand it they don't work that way
On top of this, Archangel of Thune has even been reprinted twice in past Masters sets, albeit always at mythic