Read my answer and please go on alpha tracker for problem in the alpha.
And For 3d Editor, maybe we have it in the final game, maybe not and maybe we can have it with mod, actually few movies about experimental mods with 3d editor were on the net.
Few solution at this time, a great mod on arma 2 that can be found on Arma 3 : Virtual Battle Training by L'Etranger, you can have a mission with a 3d Editor and few functions.