I am thinking about a BTC to ETH or BTC to XMR type of Swap service with different features, since the mixer is no longer there then it is likely that the service will develop, but we never know what will happen in the future unless we believe there will be better growth and they can return to advertising on the forum to keep marketing here.
That would effectively be an exchange, not mixer. If it was advertised as a mixer or had a mixing feature, it would be banned as well. From the perspective of someone who wants to make his bitcoins untraceable, using exchange is not good enough as it's not clear whether the owners will keep records of transfers etc.
It could work if such exchange was 100% anonymous and put emphasis on privacy being their main goal.
On the plus side, as you posted in the coinomize signature thread, some mixer campaigns are starting moving to altcointalk, so it's not like they're gone forever. Hopefully the trend continues and all mixers would move there (together with the participants), creating more traffic and more competition, driving the pay rates up.