Flareon: only competitors are CD mon or Legendaries- for me its still great, and cheap to have. 35lvl WB Eevee and for 25 candy ready To Go mon.
Jolteon: For now its still fine option. Legendaries are expensive to get, and Electivire have hard to get candy in some biomes. Magnezone release will put him down, however
Espeon: Agree with you mostly, just Alakazam isnt that much stronger, to call it "outclass"
Vaporeon: Have more, and hardest competitors. Gary, Kyogre, Swampert, Milotic and HC Feraligatr soon. Only positive is acess to Aqua Tail- i enjoying using this move.
Umbreon: I dont play much PvP, but in Raids, gyms hes pretty useless.