We are waiting for the issue to be resolved, before that there is quite little we can do. The Slack-team has not been able to jump aboard the mainchain even if almost every measure has been taken.
Then heat slack team should find the best chain they can and put forging power behind that.
The 'heatwallet' chain is not necessarily the 'main' chain. It looks to have only 3 big forgers. Get enough smaller ones to overtake and force reorg.
That would be terribly unhealthy for the project and could act as a precedent. Seriously, I do not mind Supernet getting couple of additional coins and we should not penalise them for being on the right chain. That would be greed.