I fixed it.
Yes, three types of timings will reasonably be available:
The Denizen classic event-based timings, so you can see which event is eating how much time.
The generic background Java timings systems.
And... a Denizen2 per-script timer thingy is reasonably likely to be added as well. (Which, I believe, this one is what you're asking about here)
However, "each command inside the script"... is too far imo. A lot of commands will run in so many nanoseconds, and we wouldn't be able to so much as produce a number for these cases, leading to more confusion than anything in these cases. I can see where it'd be useful, you want to measure whether BigImpactCommand1 is worse than BigImpactCommand2 (Where each is, for example, editing an entire chunk-full of blocks or something)
There will be tools available for a script to do precise timing of its own, and if you think you have a situation like the above, it'd be an excellent place to employ precise script timing tools.