That's personally what I like about it.
For me, Pokémon is that one game I can always count on always being well-made, because it never changes. Nothing really revolutionary is added, yes, but then it just wouldn't feel like the classic formula it's perfected over so many years. Nothing to muddle it up or make it seem stupid and generic, but simply improvements on a time-tested design. Some people like innovation, but I am a guy of very simple pleasures; give me a hundred new Pokémon to catch and train and I'll be happy, I just like playing the game. I have played through my FireRed cartridge many a time because it simply feels right, and no matter what I can always enjoy it if I have a few hours to burn.
I thought the games got better and better over time......stopping at Emerald, of course. Diamond and Pearl, and Platinum as well, felt extremely redundant and the added visual effects did in fact muddle up the gameplay by making it feel slow and unresponsive during battles, exploration, everything. It seemed the main gimmick was in adding a ton of new legendaries. Which is stupid, considering a good team doesn't need some super-powerful Pokémon. This is why I'm anxious for the new Pokémon game for the first time in a very, very long time. Black and White will only have its own Pokémon available to catch before the National Dex, a whole new region that has the potential to be a lot more fun to explore, a new Team Whatever whose focus is different entirely (which might mean some MUCH more interesting challenges than the bullshit Team Rocket Base repeating itself), and overall it looks like a complete remix of the old games that keeps the classic formula, with a lot of potential to it. Game Freak has failed horribly to change thing sup with Platinum so I'll consider this their last chance to prove they aren't just cashing off nostalgia.
That being said, I think they should explore alternate forms of gameplay, maybe more real-time or live-action.