This is the most way to analyze a model in the system dynamics community. Knowing your loops, easy to do in a little model and not so easy in a large one. All the other programs do this. I suspect this would be a very easy feature vs lets say the Phillips Diagram. As all it involves is a text output.
It would be each variable with a positive or negative sign in front of the variable then a right arrow after to the next variable in the loop. Over course if there is a odd number of negative signs it makes it a negative feedback loop and if its an even number its a positive feedback loop I'm at the point that I have to design my latest model in Vensim so I can get this info, as if I plan to submit to the SD Journal I need to trace all the loops. I have included a screenshot from Insight Maker on what I'm describing.
Taking this a bit further a user could click on one of the loops and have placed on one of the publications tabs, and it would behave much like the Phillips Diagram where the wires expand to demonstrate what the SD community call "feedback dominance".