KMag - have you reported the errors you got to Ludei or us with .capxs to reproduce? It would be good if we can fix those issues so other people don't run in to them. I don't see any reason those problems can't be fixed, and I would guess it would involve a lot less effort to fix those problems than shifting to a whole new engine which is a vast amount of effort.
kiyoshi, 
Arima - it sounds like an interesting strategy, but the big problem with using a new language is third party plugin compatibility. We already have a large library of third party stuff, and it's all JS designed to be run in a browser. I really want to avoid compatibility headaches where every plugin works on just a few certain platforms, since it can make it prohibitively difficult to find a reliable set of features that will work on a broad set of platforms.