Partner Eevee gets a +10 to HP and +20 to every other stat, 110 in total, so how broken would every eeveelution if they also received a similarly distributed 110 point boost? Zamazenta is in OU with a 660 BST as an example, so it's not like Vaporeon will rocket to AG with 140 HP, nor Flareon/Glaceon/Umbreon with 85 Speed.