You should have a look at our live FSM view feature in Sigasi. Sigasi now has an interactive State Machine Viewer that updates while you type your code. You can also click it to navigate back to your source code. This interactivity greatly enhances the advantages you described in your post.
And it even works with unfinished or broken code.
You can watch a screencast at http://www.sigasi.com/screencast/vhdl-state-machine-diagram
What are the engineering and design challenges in creating successful IoT devices? These devices are usually small, resource-constrained electronics designed to sense, collect, send, and/or interpret data. Some of the devices need to be smart enough to act upon data in real time, 24/7. Are the design challenges the same as with embedded systems, but with a little developer- and IT-skills added in? What do engineers need to know? Rick Merritt talks with two experts about the tools and best options for designing IoT devices in 2016. Specifically the guests will discuss sensors, security, and lessons from IoT deployments.