Unintentional instance saving
We did speak with some of the developers about this recently. While I'm unable to comment on your specific suggestions, I'll say we were all in agreement that something needs to change with raid IDs. On the one hand, we are happy that pick-up groups have a wider array of options at their disposal, whether it be 5, 10, or 25 man content. On the other hand though, it's currently too easy to end up saved to an instance that's been cleared, or close to it, without knowing ahead of time this will happen.

We've been looking at player feedback in this regard, and are working to develop a better interface to warn players that will be saved to an instance that's been partially, or completely cleared. This is something that might not happen in 3.1, but we'll be discussing this further internally in the near future.