Your stalk-harvested plants look great. Tobacco is a perennial plant. So long as the root system is not killed by frost, they will regrow. For us non-tropical folks though, the issues are the curing conditions for a sucker crop, and the quality of the leaf on the re-grown stalks. Some growers in Cuba regularly harvest a sucker crop, but use it mostly for cigarette filler.
I've found that Prilep 66-9/7 sucker leaf is indistinguishable from the primary leaf, once it has sun-cured. Most of the cigar, burley and dark tobacco varieties from which I harvested, cured and finished sucker leaf were disappointing. That's partly the initial quality of the sucker leaf, its degree of maturity at (second) harvest, and the cooler shed temperatures while they air-cured. Sometimes, they would freeze in the shed at mid-cure.
Give it a try, if you are up for the added labor. Worst cast is a lot of mediocre filler.
Bob