What you're arguing though just isn't going to happen. GameFreak aren't going to trim down the size of the roster, and the games are only going to get bigger from now on. Now what I'd personally like is for the future games to have a BIGGER starting Pokedex. With the next games going to have near 600 Pokemon, give me wider varieties in the routes. I think the "normal" Pokedex should be at least 300-350.
Edit: Also, my view on what Pokemon is very loose. I think Pokemon strives to be for everyone and any changes that are made have to take into account everyone. Battlers, collectors, type collectors, people who love specific pokemon, etc etc