See here from the mask thread -
That it's the same policy for employees as guests does offer some insight.
To me, this says they feel the community spread is (or will be) low enough that the rate of breakthroughs in vaccinated people isn't going to have a negative impact on staffing beyond typical. If they thought it would, they would keep things to try and reduce it.
With the same rule, it'll be interesting to see if they enforce the unvaccinated required to wear. Since, they know who is which and it's in the rule. For the same reasons, if they have it in the rule but then ignore it, what other policies can employees just ignore? How would an employee know that one rule matters and has to be followed and another can be ignored and not followed.
I hope they're right about community spread falling through the floor. CDC has Orange county at 7 day 548.57/100K. NYT has Orange county at daily 78/100K and FL at daily 38/100K. Headed down for sure, but not quite there yet. Hopefully it doesn't stop falling.
Personally, I'll feel much better when the daily is under 5/100K and the 7 day closer to 10/100K.