we are testing the new API constantly also on Tamino V2.3. Except for some new functionality, which is not available in V2.3, everything else works fine.
I can’t say anything about Tamino V2.2, however I would assume that the basic functionality works as well. But: No guarantee here!
This is, what the readme.txt file sais:
"The software is intended to be used to build applications for Tamino V3.1. It can also be used to program application for Tamino V2.3; however, some functionalities are not available in Tamino V2.3 (e.g. TSD3, which is support for XML schemas)."