I'm partway through my first tank of B100 and the warm idle/shaking on mine is reduced. I plan on having the nozzles cleaned and balanced in the near future, so I'm not suggesting this as a permanent fix for the side-to-side rocking at the stop light. Maybe try a blend to see if that affects your car.

I think this might be an "all the above" with basic tune-up stuff for getting a clean smooth burn - clean fuel, clean air filter, adjust valves, air-tight lines, clean injectors, good motor mounts and shocks, etc; incremental rather than drastic improvements.