1. I'm pretty sure that item is not getting added into the game, as I believe it has been said by staff they won't add Exp. Share. "Oh but people say it's boring to grind!" Well too bad; The game was meant to be mostly grind, grind and grind until you get where you want to be.
2. They might increase the servers size, although not planned for now. I think their main focus for now is getting Hoenn done, so it won't happen anytime soon. Plus, it costs money too, as you already know and mentioned previously.
3. The reason why some moves are missing an animation should be the fact the animations for moves are more of a "small addition", in which they're probably not looking forward on making it fully, hence why the few move animations. I'm not sure, but it's just a theory.
4. It might happen, though confirmed by staff, the game will only have regions ranging from Kanto to Unova, including the in-game islands & anime islands (I think), so the only way you'll see future generation mons will be in rather awkward and unique places - like how there's Furret right at the start of the game, Route 1, whilst the pokémon is from Johto, things like that.
5. Absolutely not. The players who buys Membership, some of those players buying Membership monthly, they pay real money for it. Of course they'll need to be awarded somehow, and eitherway, you can buy the membership pokés off someone. It isn't discouraging players, in fact it's "encouraging" players to buy membership if they want double exp, 50% more money, early access to pokés and more. I'm aware buying membership isn't necessary, but i'm just saying they do deserve something in return for supporting the developers.