Also AFAIK bittrex uses Microsoft platform to power their engine - that makes scalability really painful, so I assume they are struggling with common problem in IT - How to lower the load, without lowering profits. As usual users will be those who pay 
Bitstamp features the same fee structure. Both are highest in markets, all other exchangers are lower.Most others offer a monthly trade volume based discount, I once had a month on Kraken where I was like 0.14% on fees.
If someone could shout out a great new exchange I would be all ears, Kraken seems to need another month or two for fixing their broken engines.