The switch change was deliberate. It is to help with forgetting to handle some cases. It does require going through your code and determining if you want to ignore unhandled values. I think this is good because it is better to be explicit. In many situations it should be an error. But if this is a problem for people then we could add a command line option to disable this new behavior.
I’m not sure what changed with the parenthesis. A lot has changed since 2007. I will look into this. It may be related to allowing things like 10.Times { … } without the parenthesis. (probably not very important)
If you really want to stick to the 2007 version I don’t think it would be hard to apply the query fix to the old source code. But there have been many other bug fixes as well.
I agree that changes that break old code are sad. But sometimes they are necessary to move forward.