I've never modelled so much as a polygon, so I don't think Construct's going in a Blender type direction. If you want a full on 3D first person shooter with world editors and 3D collisions and the works, Construct isn't going to be a good choice for some years to come, I guess. Part of the problem is you won't get very far - in fact I don't think you can get anything drawn at all - without some pretty heavy math involving matrices, vectors, euclidean angles, vertices, and possibly quaternions (I say possibly, because I'm not sure what they're for or how much they're used in 3D gaming). I'm of the opinion that a completely flexible 3D game maker that is easy for a beginner to use is not possible like it is in 2D, except with limitation. As far as I know, programs like FPS maker work by hiding this work from the user, which makes it less flexible. I don't think you could go and make Crysis in any of those programs without dealing with the nuts and bolts yourself.