Just to clarify it - my idea was only to change format of .cap files. Nothing in workflow of Construct itself would be changed, only .cap files would change.
I work in game development team, and we were thinking of using Construct, but since it has binary file formats, it (still) doesn't work for us.
If Construct is indeed moving towards XML, that's even better news, but I understand that's huge task which needs lot of time o accomplish.