It seems to me that the "risk" is overblown.

The biggest "issue" that I've read about is scaling the screen for different resolutions, this could be solved by an update with an intelligent scaling algorithm.

It seems to me what Google is trying to do is improve the native applets so that OEMs are less likely to want to create their own.

Also, nothing says that Google is banning these vendor additions, just discourage them.

Remember Android is an open platform.