I'd like the first say that I think this is a fantastic idea and it seems to work well with a couple of exceptions.
I've had a couple of model mismatch that came up with a batch render do to reorganizing a couple of things so it was expected.
It seems to be asking for the model renamed twice for each sequence that there's a mismatch.
Once before it opens and once after.
Also would there be a way in the future to handle the model mismatch thing as a one-time deal.
Such as when the Box comes up to ask what to do with the model mismatch that you would have a way to apply it to all the sequences that are going to be rendered.
It also seems to be trying to open up a tmp file once it's done which brings up a window with Windows 10 asking which app to use.