We are planning to release updates to eCart next, after that we will probably work on design Extender, then on data Bridge.
we do plan to look into adding more Ajax, grids, and mobile support.
If there are specific features you would like to see, please post to the wishlist forum.
"ajax functionality, grids, html5" are rather vague topics, so it would help to know what specifically from those groups you would like to see implemented.
as for Data Bridge crashing, make sure that you have the latest 1.1.3 version installed.
if it is still crashing, some things to try are:
-Disable the preview
-Close the Files panel and the server behaviors panel before running any wizards.
if you still have a problem start a new thread, and we can look into the problem with you.