it makes perfect sense to me as it is... the lock is totally needed IF you want to unfreeze...
IF I want to futher deal with the wav, I just unlock it, copy it to a new track below and re-lock the original.
I have a macro working that colors a frozen track blue and adds a snowflake track icon to it so it's very easy to spot in the tcp or mixer...
so I don't agree that we need any more icons on the item itself...