Overall I'm a happy camper with v2.1.1 - all of the significant issues reported with v2.1 appear to have been resolved.
ISSUE 1:
However when bringing temperatures up to speed, v2.1.1 does not hold nozzle temperature whilst the HBP heats up UNLESS the nozzle temperature is already at the set point. That means that if you nozzle was currently at 200 degrees (required 230 degrees), that temperature is allowed to drop whilst the HBP comes up.
Previously the nozzle temperatures were put on waiting status, held wherever they were whilst the HBP came up.
This situation slows down printing, because by the time the HBP comes up the nozzles have dropped right away.
ISSUE 2:
S3D does not "remember" the settings for the model. If you double-click the item in the top left listbox and define a new multiplier, that value is not saved if you exit and restart S3D - although S3D does automatically reload the last model you were working on.
I don't know if this was an issue with previous versions.