Currently when the post-expression graph is turned on 'Include this property in the graph editor set' is automatically activated for that property.
It's very easy to end up with a graph showing properties you don't need to see, and it can be time consuming to go through and track them down.
What would be great is to either decouple this behaviour so the 'Include this property...' is not automatically checked, or to add a preference setting so that it can be turned on for those that find it useful.
In my personal workflow, I find that I will often want to check a post expression graph, and then toggle back to the pre-expression view. It's much rarer that I need to keep a property visible in the graph set, and if I do it won't always be related to expressions, it's more likely to be for timing reference against another property.
I understand that everyone has a different workflow, but I think separating these two buttons (or having the option to separate them) would be a great quality of life enhancement.