I do not know if this is too early or it has been raised before (search on the forums wielded no results), is there or will there be a Quest editor for the Descent 2nd Edition akin to the editor we had for the first edition?

Anybody knows anything?

I am quite keen to build my own quests and stories and something like an editor would be greatly enhance my experience of the game.

Let's wait until the game's properly released before asking for anything more, how about it? There's about 3 people (ok, gross exaggeration, but still) out there with the game so far. Most of the stores haven't received it yet. I'm sure you've not played through all the quests included yet?

The "official" quest editor for first edition went unsupported for years; the only editor I'm aware of that handled anything past the first expansion was actually a fan effort.

I think it's a safe bet that somebody will eventually make a tile set for Tile System for D2e. It's easy enough to do, as long as you can find good quality scans of the components you need.