The reason for CRT is because it cheaper, and causes confusion. They'll never outperform a factory bike on a bad day. I fail to see the benefit to racing fans.
CRT is lacking more on chassis not really on the engine, as this WSBK bikes have been there for a few years i.e. Aprilia RSV4..That's why the true WSBK machines are much faster than CRTs with Carbon Brake and Bridgstone tires..