Architecture diagrams should be easy to read and easy to maintain. This is exactly why I'm building https://isoflow.io
If only it was not so difficult for our megacorp to give you money, process-wise.
I recall a friend of mine once saying his planned product would have a price-point that a typical mid-level exec could simply charge to their company credit card without being an eyelid. It looks like the isoflow prices are in that sort of range. I've always wondered if that model works (my friend went a different direction in the end).