Many exchanges = more competition = better exchanges
I'd prefer many choices rather than just a small number of exchanges handling majority of the cryptocurrency market. I couldn't think of a downside as of now. But yeah, hopefully we get more decentralized exchanges in the future.
I totaly agree with u. I've tried a lot of crypto exchanges (Bitmex and Binance too) and I'm still waiting for the better one. And I'm still waiting for Monfex launch, hope to try trading on demo account. I heard that it'll be the simplest crypto trading platform