It's still decent but just gets outclassed by Moltres and Entei as a fire attacker.
Remember when GamePress created the new list they specifically mentioned what qualities the ranking was based on:
*Ability to successfully solo tier 3 raid bosses
*Ability to maximize damage output vs. Tyranitar and tier 5 raid bosses
*Ability to maximize damage output vs. other tier 4 raid bosses
*Performance vs. common and optimal gym defenders
Eevee being a common spawn certainly brings Flareon an advantage, but it's just not a key factor they were looking into for this specific version of ranking.