Cool, nice to meet you here!

Do you cap the number?

Sorry, what do you mean? The number of urgency criteria is five by now, and except priority all are time-dynamic i.e. influenced by progress of the defined "net working times" vs. still times.

I invite you to take the code relating to the time model as the feature request. Given your perlmonk rank, I suppose your practical knowledge of Perl is better than mine of C++. You may ignore the rest, taskwarrior is appreciated as it is. My time model implementation is not yet perfect, for sure, but it is pretty complete.