A note on the waivers thing...
A few guys that were dropped prior to the change are still on waivers. I think I can manually release them, but I have to look. I'll try to do that tomorrow, maybe even tonight.
Then it should be instant all the time.
It should help a lot if one of your guys is probable and then you find out an hour before game time he can't start. You should be able to grab a free agent and use him immediately. At least that's how I imagine it.