I remove 2 of your exchange list on my exchange list.
Because they have some problem on the platform, you already describe the problem from the article. Honestly i only using 2 of your exchange Binance & Huobi.
Sorry mate do not be offended but I respect your words about the exchange listed you aren't using bittrex and poliniex. I know binance as well is one of the most dominant exchange in cryptos. I think there nothing problem or irregularities for bittrex amd poloniex use for trading i think depends on the people's choice what exchange he/she can use for their convunce until now i use bittrex and poliniex is very friendly to use for me.