My two cents based on what the dev said on Twitter, I think they might post the community update a week before the PC release date. Their decision can go either way. They can decide to also give us the 72 hr access to Act 1 just like PlayStation OR we may not because PC players will be able to play the complete game a whole month ahead of PlayStation. Which I would understand if they choose to not give us the 72 hr for Act 1.