Hi ConstantSphere,
I have a suggestion for when adding a new variable to watch. Right now there will only be a data point when a variable changes, make sense of course. But can you add that a newly added variable gets its first datapoint the moment it gets added to the configuration by using the value it has at that moment?
One other thing I noticed is that when you want to add the first variable to the config after opening datamine2 not all the defaults are set and the safe fails. Looking in the Firefox debugger it states the JSON is not properly formatted. It shows the missing values with NaN. After populating them all it does take.
And a question. What does General Properties do? I cannot seem to find out.
Hope this helps to make it even better than it already is. Still cannot do without 
Cheers Rene