Apparently Bittrex is busy dealing with all the ETH mess, this message has been relayed on the Slack channel:
"We apologize everyone. A number of launches that people are waiting on such as, (ZEN, LGD, and other new tokens) are still on our radar but taking a back seat with the chaos on ETH the last few days. We're expecting things to settle down so we can get back to launching new tokens."
What issues with ETH do they mean? Unfortunately, I have not noticed any issues with ETH over the last days. I own some ETH, so I am now somehow worried. Is there somewhere more information?