Yes alot of new exchange come in to crypto market now, i can compared in 3 years ago its only about 20 to 30 exchange that operated. But since 2017 untill now the number of the crypto exchange is growth. I think they have seen successfully of Binance that earned alot of money. Just in 1 years Binance has amillion user, and offer some good product to the customer. The important for all exchange is they should manage the exchange just like Binance did, and expand to others country to introduce the product and while to promote advantages of crypto and blockchain technology.
I never got outside of Binance and EtherDelta yet, due to the rates of their /ETH or /BTC always. The buying trade is quite active and I have been putting good rates in my buy order, especially in those lower-tier coins that I thought that it is gonna be a slow coin to grow. Sell orders I made is also quite fast. Although I cannot conclude that much yet that the exchange is too active nor not that active though.