This is just my interpretation.
*if* we remove all restrictions then the R number of the new variant will be close to five.
*if* 80% of people are vaccinated and the vaccines are 80% effective, and children are unvaccinated, then there is enough space for the virus to grow exponentially again.
It then runs through the unvaccinated population, and those for whatever reason the vaccine is ineffective, then the death rate can exceed 1000 a day.
I don't think this is bad news per se, it's just a reason to be cautious about opening up, and monitor things closely.
The end is still in sight, this is informing the best route to take.