What the f.. I think you have missed something very important about this deck. Me and my friend builded this list, and he went 4th in here Finland. So I think I know why those cards are there so I explain;
Nice job, I play this as well, but i'm guessing your list is at least in some ways different than his. Its not like they are exactly the same.
You don't need 4 Vanilluxe, because you have Rescue Energy. You need only 1 in the game. You have active Vanilluxe, which takes 2 prizes. When it dies, you have build another Vanilluxe/Vanillish on your bench. If you had Vanillish, you can evolve it because your KO'd Vanilluxe returned back to your hand. Then just keep it going.
And what about when you play Magnezone? It is also a lot harder to draw into one if you only play 3.
This deck needs N just like other Vileplume decks. Yes, you don't need 4 copies, but I think that 3 is absolute minimium. You need N to disrupt your opponent, because he/she takes the first prize always. And you need N for antidecking card. Usually I draw the whole deck on my hand and then just use N and get ~15 cards back to my deck.
And what about when you are about to deck and you only have 2 prizes left? If they kill that Vanilluxe and you dont draw a god hand, your in a pretty tight spot. As I said before, it only helps them early game, and hurts you late game. Its not like hand refresh is a bad thing, thats the entire reason people play PONT in the first place. PONT is just as good as an antidecking card.
Bellossom is the 3rd important card in this deck, after Vanilluxe and Vileplume. You NEED IT or you will lose to Zekrom/Eelektrik, any Eelektrik deck or any Kyurem Deck. Eelektrik player can use Tynamos Thunder Wave (or what it is, that 40HP Tynamo's attack) and hit you with 10 dmg and paralyze. Then next turn their Zekrom KOs your Vanilluxe. If you have Bellossom, you can heal that 10 dmg away and just wait that they hit tails. Bellossom is also needed for Kyurems. Kyurems 2HKO your Victini if you don't have Bellossom. With Bellossom, it is 3HKO or even 4HKO. And against Cobalion/Kyurem decks, one Kyurem spread and then Cobalion's OHKO your Vanilluxes with Metal Press (or whatsoever that first attack is called). And because of Bellossom, you need to Play 2 Glooms that you can get Plume and Bellossom into play.
IF they play the 40 hp version, IF they flip heads, and IF they havent already evolved their Tynamos. It just seems like a waste of space and time to me, but I guess it only takes up 2 spots. Against CaKE, only someone not to smart would charge up their Kyurems instead of Cobalion, Cobalion 1HKOs Vanilluxe, which is how this deck loses.
Reason to play 2 Cleffa is that this deck needs eeek. Start with Pichu, serach for 2 Vanillite, 2 Oddish and Cleffa. Then next turn just eeeek. If Cleffa is prized, you are in huge problems if you don't have drawn any supporters besides Twins. Smart player don't let you use your Twins in the early game. This deck can't run Juniper, because you have always something important in your hand. You can't play Cheren, because when you have setupped, you don't need Collectors, Candyes, Communications, Vanillites, Vanillishes, Oddishes, Glooms, Pichus, Cleffas etc. You have so many cards that you WANT to discard, that you can't play Cheren over Sage.
If you really want Cleffa, at least only play one. If the first gets knocked out, you should never, ever need to bring up that second one. If you need to rely on Cleffa so much, you really dont run enough draw power. And they have to knock out something eventually, and you can be setting up all the while. It doesnt matter how much they get set up, once they are locked there is nothing they can do.
Rescue Energy is enough recovery. Yes, you can lose 2 Oddishes because you didn't draw candy + plume. But that happens like once in 50 games. I have played over 100 games and I have had only one game where I have lost all my Oddishes before i could evolve them. This deck gets usually T2 Vileplume without Twins, so I don't understand why you want to play FSL. Okay, vs Typhlosion they can discard your Rescue Energy with Typhlosion. Then just put 2 Rescue Energy to your active Vanilluxe and problem solved. And if you are stupid, you play Victini before you have setupped Plume. I never lay down Victini before I have Plume in play, so I don't understand how they can Catcher it. People should playtest decks before you suggest any changes <____>.
Putting two rescue energy on one Vanilluxe is a great example of why you should play FSL. Also, what if you start with Victini or an Oddish? You can say bye bye to it. And if you draw it with Sage's Training, only you need the other cards in it? I have tested this for 3 weeks, and have taken it to 2 CC's. One I made 4th place, the second I only just missed top cut because I had awful resistance.
EDIT: And about Unown Cure, yes it gives some problems if you use it correctly, but I think that it doesn't help that much.