Evoboost is like light ball for Pikachu but the boost is actually big enough to make it viable provided Z moves have priority which the trailers thusfar seem to indicate
After an Evoboost Eevee's effective BST is 55/110/100/90/130/110, and of course boosts include EVs and IVs, so the effective stats will be much higher on a max IV and EV invested Eevee. But even not taking that boost into account you suddenly have a pure normal mon, with access to adaptability, with effective stats higher than the base 600 legendaries and most importantly it has stored power, which after one Evoboost has 220 BST from the 10 stat boost equivalents it gives.
So Evoboost Eevee is both pretty strong defensively (even with such shit HP and no item, 55/100/130 is almost Dusknoir tier defenses which is pretty decent). Eevee also has access to Wish. Not to mention Baton Pass which could let you pass your retarded +10 worth of boosts plus a wish to a non shitmon.
