I kind of agree, although removing a good part of the game was a step forward, it made a lot of people leave. Those people being the lazy forgets who would put 30 bricks on a map like spyglass and call it "good".
And yes, ALL of these new updates in fact, would or could have been community made projects. Shadows would take a hell of a time to make, and would require tweaks to the engine like crazy. And yes, game modes could have been an addition or add-on, take RTB for example. RTB is a quicker way to download user created mods and add-ons
and there could have been for a faster way to host something similar to which we have today.
Terrain will always be a pure aspect of this game, as it sparked adventure in those maps. The first time I found a secret in bedroom I called all my friends to only find out that they already knew it lol.