More Blocks Less Mobs

Minecraft has always been a game about the player, not about the game. It used to provide players with blocks and minimal builds to allow the expanding of their imagination. Now it seems everyone just wants to keep adding new mobs, new naturally spawning buildings etc. The problem is, there is such a thing as overdoing.
What do I mean overdoing?
Sure adding new mobs and new buildings expands some possibilities but that is why modders came in. Once you add too many mobs the possibilities begin to FALL.
"its adding to the game"
Yes! but a great example is my SMP. A modern world government style SMP. We have skyscrapers and cities. What happens when people start getting overworld dragons and insane mobs? The cities lose realism. The problem being that when things that are HARDWIRED into the game get TOO medieval etc, it becomes less of a sandbox game and more and more like an adventure style game which is NOT what Minecraft was or is classified as.
So I'm anti-progress?
ABSOLUTELY NOT!
If certain features are added, add a special mode for them or toggleable features! Blocks are a great way to combine all the worlds. Copper, or stalactites are a GREAT way to improve gameplay for builders in all points, but new mobs that are not realistic or have not point in the game is not helpful, just as adding more buildings that clutter up the landscape and force a certain building idea on the player. Imagine that but instead some villagers had skyscrapers. Not very good for a medieval style world.