This seems like a decent team, a powerhousee team that will blitz through the team, having Swampert soaking hits if necassary.
Espeon: Not a bad moveset, considering how poor her move pool is. Focus Sash or Choice Specs is a rather though question, and boils down to what do you fear more. If your afraid of a more powerful sweeper taking out your Espeon in one hit, Focus sash is a perfered option (only if you lead with her. Stealth Rock can screw you up otherwise). Choice specs is if your afraid of being outwalled or stalled, particularly with steel types.
Dragonite: defiantly Outrage over Dragon Claw. 3v3 matches are short, and if your lucky, a single dragon dance boosted Outrage can take out the entire team. Earthquake and Fire Punch give you perfect coverage, but Extremespeed can kill off more potential threats as well (Specifically speaking, Ice Shard Weavile).
Swampert: Curse boosting with Swampert is a very viable option, and Waterfall/Ice Punch/Earthquake/Curse set has been done to death. It's well played, and can soak hits all day. My only concern is your EVs, which should be invested into HP more, and then some Special defense so you can soak hits from all sides.
Not a bad team, but I can see a few problems with powerful special sweepers like Gengar. Still, it can hold up on it's own