When it comes to creatures such as Wasp, Hound, Cat, etc, I agree with @
Hussar : one entry with a Customization sidebar is more than enough (look at how the Giant Lizard entry in DDN eliminated the need for pages of Cave Lizards, Crocodiles and the like).
Giants, on the other hand, have extensive cultural differences that would already warrant them more pages, so it's not a big effort to give them separate stats, as well. BUT, the differences need to be a bit more than just AC, to hit and damage numbers. IMHO, these creatures need to FIGHT differently (storm giants hurl lightning, frost giants have a cold effect, hill giants simply try to beat you to a pulp, stone giants are expert rock-throwers, etc).
But Wasps/Hornets/Bees have none of that, they have similar shapes and behave similar enough to allow for a single entry for the vrious kinds of winged insects.
As for Dragons: Birthright already did that. "Cerillian Dragon" was a single entry with stats for Old, Very Old, Ancient and Venerable dragons. In 1e-3e, I'd say that Dragons could be summed into a single entry, with customization options, such as "White Dragon: this creature's breath deals cold damage; Traits: Icewalking". In 4e, dragons got more differentiation (whites are more berserk, greens are manipulative, etc). Judging by the Black Dragon entry Mearls previewed, it seems like that differentiation will continue, and will include motivations and lair details, so the dragons still warrant individual entries.