Yserbius, rules for new variant are unclear. Looking at preventing serious disease, you may be right that high vaccination/previous disease by itself will prevent worst outcomes. Masks will limit transmission. Usefulness of masks may depend on SD and ventilation …
I wonder whether high transmissibility means that those who are generally relaxed should plan for the easiest way to go thru infection: a vaccine in addition to initial dose or previous infection and plan for some exposure under light conditions – so that as they are getting infected, they are not getting a huge dose by sitting in an office for hours with people…
to those with “natural infection”, they should follow recommendations for booster similar to those with vaccination. Antibodies are at about same level 6 months after either event (vaccination higher first, but declining faster)