Definitely, IDEX is the first exchange for Sether. But there will be another, and I think it should be bigger then IDEX. Sether is great project, and their token shoul be listed on such exchanges like Kucoin and Binance.
yes I am very sure if there will be future changes for this coin because of growth and the team has worked hard to be able to make this project successful. we just wait for a big exchange.