>>35581833Mismatched stats and movepool.
Glaceon has a great special attack stat, but can only utilize STAB and Shadow Ball with it
Flareon is basically the same, but with physical attack
Leafeon is Flareon 2.0, and way too dependant on the Sun or else it has no ability.
Umbreon was actually pretty good, but it's succumbing to Power Creep now and it won't be long until Umbreon is with the rest of the shitmons in PU
Espeon at a point was the best Eeveelution, but BP got gutted through Smogon so now
Jolteon and Vaporeon are also succumbing to power creep like Umbreon, Vaporeon more so.
This leaves Sylveon who pretty much gets carried by it's typing, more or less taking Vaporeon's old role.