I'm curious to hear other's thoughts on they think would be useful.
Please don't hold back ideas! There's very little harm positing silly or unlikely ideas, but there is some potential value (perhaps more than you realize).
Inspired in part by calebo's comment here
A tool that makes systems modelling (with sinks, flows, and feedback and feedforward loop) as easy as Monte Carlo modelling was made with Guesstimate.
I would like to think it's worth it, and wasn't suggesting that this would make the project not-worth-it, but just wanted to make it more clear what the costs would be.
Given that the costs are significant (though possibly justifiable), one easier approach would be with small solution to start.