For now , Let's keep it 2D , Maybe when Ashley finishes all his To-Do list , you'll see 2.5D , but not for now ...
May be, but in the ever changing world of HTML5, I hope Ashley is thinking about supporting the emerging 3D standards (at least). Construct2 is such a neat project, it would be a shame to miss out on this aspect of gaming. 2.5D "Space Harrier" style game play would work well via the current construct2 sprite objects/engine.
Anyway, just a suggestion. Until then, I'll carry on with the array and event munging :)