The mixers ban in my opinion was not on an anti bitcoin campaign. It was because of its links to fraud and money laundering. Of course, we understand that the government where against anything that would prevent it from seeing and controlling people so they had to go against mixers, but there have been cases where some mixers were caught to be a fraud. Mixers were banned to protect the forum. It was kind of like the Jonah and the boat scenario where Jonah had to be thrown into the sea so the storm could calm down.
With Mixers in the forum and the government strongly against mixers, the forum could feel a lot of heat for allowing mixers to advertise here. So the best decision in Theymos's view was to throw the Jonah off the boat.

So even if the new government is pro bitcoin, as long as they still tightening their grip on mixers, I don't think it would be allowed back on the forum.