Honestly, since we're in the Suggestions forum, can I suggest that when a thread is marked Low Priority, it completely disappears from the list of threads in a given forum. Conversely, I would like to see any thread marked High Priority jump to the top of the threads in a given forum each time there is a new post in that thread.
If that's too much to ask, then how about this: I never want to see a low priority thread in my sneak peek, but always want to see a high priority thread. I seem to recall some discussion as to why threads that you post in are not automatically considered high priority (though I long for that, coming from HT)