About the september 12th update: i think it's a good move adding Gas: there is only another exchange, binance, that trade both pair neo and gas and it's usefull to have the possibility to trade gas for buying neo in the same exchange. I like also the idea about BCH pair.
there's Kucoin as well, they also credit GAS to you if you hold NEO in your Binance/Kucoin wallet? Coss will do that as well? Not that I'm interested since I hold my NEO into Neon wallet