Despite any official line the company may take, they obviously delisted bitshares because, if successful, conceptually BTS would not only disrupt Bittrex's profitability model but could easily put them out of business. Mount Gox is not going to be the only catastrophe in our cypto lifetime, there will be other storms and services like Bitshares (maybe an equiv will emerge thats better etc) will be the only truely safe place to trade. Liquidity is/will be an issue but I suspect something major will happen in the crypto space to propel BTS popularity and solve this issue.