There has long been a feedback mechanism to ensure the output from the training machine (regardless of how long it is currently taking!) is of the standard that the front line requires. Part of that loop is the Creamy system (or First Assignment IP as our US friends would have it). If you can impart enough knowledge and skill to the point where that person can be trained to instruct successfully, then you have an immediate validation of the standard of pilot being produced from that stage of training, and a validation of the internal assessment process.
As to whether it's a step in the right direction, it is surprising it didn't happen years ago. If it is OK for BFT and FJ AFT, why not rotary?