alex, what kind of automation were you thinking of? a huge equation that checks all the main things to decide what equation to use? you have some functionality in the formula goal to do this but i don't think you're going to get everything.
i'd say you should be able to come up with a few part/assembly or even flow templates where you have the appropriate equation defined and then use those when you start a flow simulation project. that will save you a couple of steps.
to get full automation, you're going to have to figure out how to get an if/then else statement to determine which equation to choose from. and then you'll need still use templates to start the project or copy/paste from excel or something.