Well, I'd love a justification for reanimate as the worst card in UB. It's an amazing card and is vital to the all-in build.
This is pretty much just my personal opinion but I find that, in this deck,
reanimate is just a horrible trap of a card. There is simply too much spot removal in the current meta to warrant losing cards and anywhere between one-quarter and one-half of your life points on a creature which could very easily die to a myriad of effects before it accomplishes anything - especially when there are safer (albeit more expensive) options to do pretty much the same thing. Bonus points for becoming progressively less useful the longer the game drags out (as you still have to take that massive life point hit and, unlike Deadwalkers, have no way to recoup lost life).
Garren, do you truly believe that
exploration is worse than
into the wilds and
rites of flourishing?
In this deck? Yes. Yes I do.
Exploration simply requires too much to fall perfectly into place to be of any use - in a deck with a lot of draw or something that supports it then it would be fine but here all it's going to do is *maybe* speed your ramp up by a turn or two but even this requires that you begin the game with both it in hand and a fist full of lands to use with it.
Into the Wilds is a poor mans Oracle but at least once played it will sit there and do its thing - occasionally it will even allow you to draw something good that otherwise would have been a land.
Rites of Flourishing is also wildly out of place in this deck but hey at the very least it isn't a useless top deck (as you can still play it and increase your draw late game while
Exploration will just sit there being useless).