I've been playing Sylveon and have gone 8 for 9 so far with it. I'd have played more games but it's really slow.
I personally would drop lele and Wobb altogether getting a first turn sylveon sets you up perfectly and making it a 4 in 7 chance of doing that is terrible odds.
Like someone else mentioned I'd drop an Ultra Ball as normally you won't need any especially if you dont play lele and wob.
Also I run 2 float stones and 2 enhanced hammers. 2 Deliquents could be overkill though I have had a game where it's been prized and I was really upset that I couldn't use it.
If you're curious here's my list. (I don't have Vaporeon as I haven't played a Volcanion yet but I'll probably drop the choice band for one if I do see one and struggle with it)
##Pokémon - 8
* 4 Eevee SUM 101
* 4 Sylveon-GX GRI 92
##Trainer Cards - 40
* 2 Team Skull Grunt SUM 133
* 1 Choice Band GRI 121
* 1 Super Rod BKT 149
* 2 Lysandre AOR 78
* 4 Team Flare Grunt XY 129
* 4 Puzzle of Time BKP 109
* 2 Silent Lab PRC 140
* 2 Enhanced Hammer GRI 124
* 4 VS Seeker ROS 110
* 2 Ultra Ball SUM 135
* 3 N NVI 101
* 4 Crushing Hammer SUM 115
* 1 Parallel City BKT 145
* 1 Hex Maniac AOR 75
* 1 Field Blower GRI 125
* 2 Float Stone BKT 137
* 2 Max Potion BKP 103
* 1 Team Rocket's Handiwork FAC 112
* 1 Delinquent BKP 98
##Energy - 12
* 10 Fairy Energy Energy 9
* 2 Double Colorless Energy SUM 136
Total Cards - 60
****** Deck List Generated by the Pokémon TCG Online
www.pokemon.com/TCGO ******