Hi DatapawWolf,
I don't agree with you, Scirra hasn't messed with a lot of stuff yet, not because it's not realistic, but because they didn't get to it yet, we see improvements and new features all the time, like the recently added multiplayer plugin, or the tilemap before that, or the pathfiniding and turrets before that, these were all realistic and required features that were done manually or with 3rd party plugin until officially integrated into construct and i am sure that a lot of these 3rd party plugins eventually pushed Scirra to cover that area themselves.
That being said, i don't think anyone here is aiming to make construct a full 3D engine, but a 2.5D engine is certainly plausible and can take the engine another big step forward.
Think about the possibilities of rendering objects in 3d instead of animation sprites, you have all the angles and unlimited number of animations without costing more memory usage or storage space.