This is an important feature for me.  It gets brought up periodically, gets some support, then gradually fades from focus and nothing happens.  We are making some real progress for the first time in a long time, and I would really like to avoid another dead-end.  If you can't explain exactly what you hope to learn from these tests, I don't see why we should put the discussion off an indeterminate amount of time and have it risk it falling off the radar yet again for no real benefit.