CMC gives all bad exchanges good rating, that's very misleading
Please mention the name of the exchanges! You must make it clearer by mentioning what exchanges you mean. I doubt you only think about the rating subjectively. So, let me know the name of those exchanges that you think the ratings have been misleading people. Let's check them together. 
Maybe now that Binance CZ is about to take over,
Yes, it has been taken over by Binance. For me, we cannot expect too much since it is still very beginning. Let's see what CMC is going to improve after the acquisition. We still don't see any major plans so far unless the rumor of the leadership change at CMC.