I think this is really too early for Scirra to have an opinion on the subject, since Construct 2 is far from finished I think..
As for 3D or not 3D, I don't really care, I know that if there is a 3D only Construct, I probably won't use it, since I can't make decent models, but it is doable by scirra I think (For the ones who say "An Event system can't work properly in 3D", well, the same was said in 2D before, so, excuse me to not take this argument seriously)