I find that the current implementation is already the most elegant and perfect way of showing what is going on in podium…. The arrangement window with the tracks down the side IS the flow diagram! Perhaps less so when using sends maybe.
I’d suggest that you colour your tracks in a way that helps build a better image in your mind of what’s going on. For instance you might have a high pass filter to seperate your basses from subbass so you’d make the subbass really dark, then the basses slightly less dark, then you might have another high pass to seperate mids and then you’d have your mids a lighter colour etc. This really really helps and I am sure is something that everyone probably has completely different preferences on. Just make a template track and go from that. Similarly colouring sends the same as what they are effecting. Personally I pick set values for the brightness for organisational reasons, and otherwise pick whatever hues suit my mental image of the instrument in question.
Here is an example:
