For the person talking about sleeves, there are some X/Y themed ones coming soon.
There will be 3 different kinds, featuring the new "starter" Pokemon from the game.
IE Fennekin, Chespin, and Froakie.
There is no need to increase the number of energy in the ETB.
If you purchase the theme decks & booster packs from X/Y you should have plenty.
If you need some, you could ask your local league.
The idea of having multiple theme decks, or pre-built "expert" decks is interesting,
yet then we would have even more players playing the same decks.
Instead of experimenting with various ideas.
The problem with getting energy via boosters is that you aren't guaranteed one every pack, and you are assuming that the XY set will still be available 2 years from now, when there will be no set that includes energy in their packs. The problem with getting energy via theme decks is that you aren't guaranteed to have a all 9 energy types at once. 90 energy may seem a lot, but you are looking at it as 90 energy, rather than 10 grass, 10 fire, 10 water, 10 lighting, 10 psychic, 10 fighting, 10 darkness, 10 metal, and 10 fairy. The Elite in Elite trainer box is a misnomer, because I view this product as a box set to start people's collections, and to be able to build whatever deck they want without having to buy a second ETB, or try to look for a league that doesn't exist. I guess keeping the way it is, with 5 energy per type per ETB could work, but buying 2 for $80 is too steep.
Looking at Fat packs, for $40 for one, you get 16 of each basic land, and 9 boosters each containing 15 cards. That would be 135 cards. 2 ETB for $80 would net the same amount of cards, that is, 16 boosters each with 9 cards, would make 144 cards, and combining the 2 energy packs would make 10 of each energy, so I guess that could work. But $80. At least releasing 2 ETB designs gives incentive for people to buy 2 of them. I'm only buying one of the two for now. Also buying 2 to get the close to the same number of cards as a MTG fat pack means that for Pokemon TCG, I get 16 rares, while for MTG, just 9 to work with.
About the fact that people will be playing the same decks, the decks must be built in such a way that it is in theme with the movie being released, and must not be a deck that wins tournaments. You only need to look at MTG and Yugioh to know that even with event decks for MTG, which by themselves aren't winning tournaments, and for YGO, buying 3 structure decks can give you the cards to build a decent deck, but you don't see people playing only Blue Eyes, Fire Kings, Atlantean, Chaos Dragons, Dark World, Agent, Dragunity, Machina, and Gemini Warriors decks, just because they happen to be structure decks. The problem with this is the same thing that is happening to Yugioh's Dragons Collide Structure Deck, MTG's Mind Sieze Commander Deck, and MTG's Rally and Rout Event Deck. TPCi must be very careful not to make the deck suck, but at the same time, not include any chase cards that may make the deck's price skyrocket. Remember, that this deck is meant for people who already know how to play the game to use, and it's theme ties into the movie, hence why a November or December release, because the movie happens to be released in December. This also allows the Japanese ordering and the International ordering of the sets to stay the same. Remember EX Deoxys being swapped with EX Team Rocket? Things like that won't ever happen again because it isn't the expansion that ties in with the movie, but the vs decks are tied in with the movie.
Both the all holo deck and the vs decks are meant to be fun to play, not win entire tournaments. I'd say if you took one of these decks to a tournament as is, you'd probably win 15% to 25% of the time.