That's exactly what's driven me batty about governments' responses.
After the initial lockdown, that's precisely what they should have done.
Instead, we got a schizophrenic "Everything is fine" and then "Everything is danger! Surprise second lockdown!"
No wonder people are pissed. It'd be better and more effective policy to just lay out the methods, criteria, and current status.
(PS: Technically, you're talking about R_t, or current, rather than R_0, or initial)