When building a flow, I have a lot of ways to Initialize and set variables. I can use other expressions to populate them, but in PVA, I can only take user input to populate them. I would love to be able to build an expression that could populate.
In my case, I am building an ICM ticketing escalation path (which I will write a short whitepaper on). I'd like to keep the solution flow generic, which means some values I would like to populate without the users knowledge from the topic instead, such as escalation source or chat ID (which I referred to in more detail when looking for system strings to be available.
By having a rich expression builder, I can populate the variables and strings in a much wider variety of ways then just trapping user inputs.