There are 5 Coins in Top 30 coinmarketcap.com list which are not traded on poloniex. Basic Attention Token, Waves, DigixDAO, BitConnect and Byteball. I think its time for Byteball listing on poloniex.
Poloniex is not the holy grail, coins can get big without it.
Bittrex will surpass Poloniex again being more friendly than that. Volume at Bittrex has increased dramatically once people will start using margin trading that will be decisive day. Byteball anyway will go towards independence after adding new features where p2p is encouraged. This will take us to decentralization fully in steps.