Stop this 2.5D/3D nonsense already, there are already perfectly good alternatives to that and Construct needs to focus on where it excels, which is fast and versatile 2D game development. (Who knows, maybe a C3 plugin to achieve this kind of effect/illusion visually kind of like Q3D will be made for it by a 3rd party eventually.)
What we do need is better and streamlined Export options (including preferably PS4, Xbox One somehow..), improved plugin system/support, easier copying of events/objects between projects, maybe improved physics engine and some new visual features such as more versatile particle options and a dynamic lighting system. Also hoping that old projects / addons will continue to work as much as possible, with minimal changes.
We will see where it goes and what can be reasonably implemented within time and resources but it's definitely exciting that a new version of this great tool is in development. Also probably wise to not expect all the new features on day 1, I'm sure it'll continue to grow and evolve over time as C2 has.