lets see what we have here:
Map: I would like to add a map in order to move between locations. This should be dynamic, with grayed out or appearing areas, like in Shardlight.
>Yes. It can be handled as a normal scene with condition based selectable areas.
Zoom: I would love to have a zooming feature. For example when the character is moving toward an object, the camera zooms in, like the tube station in Void and Meddler.
>I don't know Void and Meddler so i dont know exactly which effect you mean, but a zoom to specific position would be doable with the shader toolkit.
Particles: can the particles zoom in or out, like snow flakes coming toward the camera?
>The engine has a built-in particle generator. The dev team is recreating it for the next version so i don't know the exact changes they make. But all in all this is possible right now anyway.
Stretching: can the whole camera image be stretched? For example think of having it printed on a gummy surface and stretching it with your hands in several directions, like up and right.
>I don't know ^_^". Maybe also with the shader toolkot.
Reflections: is there a reflection feature? For example, when the character pass in front of a mirror or a window.
>Shader toolkit Its possible to have water reflections for example but didnt get it working only for specific objects (only whole screen). Maybe the devteam will release some tutorials regarding this topic