Finally! Haven't seen the new Pokemon yet but damn 69? Seriously?! I was hoping that the Mega Evos wouldn't count, because they are temporary but guess I was wrong. Not even 100? Wow bit disappointed.
Well, consider a few points:
1. Making fewer Pokémon means that they can put even more effort and detail into the ones that
are being made. Just look at all of the new, fleshed-out gimmicks that we've gotten with these new Pokémon - Furfrou's grooming, Flabébé's flowers, Vivillon's wings, Gourgeist's size, Aegislash's alternating formes, etc. This is where one might say, "quality over quantity."
2. They have to create and animate individual 3D models and Shiny 3D models for
every single Pokémon variant. Not just the 718 Pokémon that we know of, but every form and gender difference as well. And that's without factoring in menu sprites and other such elements. That probably yields a Pokémon count that is well into the 700s, if not the 800s. Cutting back on the number of new Pokémon makes things much more manageable for them.
3. Gen V introduced more Pokémon than any other generation did, so in a way, it balances out.
4. The games are loaded with tons of older Pokémon to use, which brings up a point - just exactly how many more Pokémon do we really need? With this generation's type retcons, even the Fairy-type has a reasonably diverse pool of Pokémon to choose from, and that is still nothing compared to the other seventeen types that have now had five-to-six whole generations to grow. And what about stat spreads and movepools? For how long can they continue to stretch the mechanical fabric of the games before things begin to become either redundant or overpowered?
5. Is having only 69 new Pokémon really as big of an issue as some people are making it out to be? Hypothetically, would you have used each and every new Pokémon that they introduced? It is unlikely. Having 69 new Pokémon cuts down on a lot of "filler." And again, that is without considering the five generations-worth of Pokémon that are still avaiable for use.