The main improvement is in error reporting. Now exceptions are much more informative since they come with complete line number and column information.
The only API change between 2.0 and 2.01 was the elimination of the CacheListener/CacheEvent API. Now, if the updating of a template file fails, the exception is thrown back to the caller to handle. If you want logging to occur when a template file is updated successfully, you can override the logFileUpdate() method in FileTemplateCache.