@lukecro for updating the existing deals close date, the only method I see in doing this now is through Ops-Hub professional, which allows you to add # of days to a date property. The only issue with going this route is that if you set a close date (by default), and then automate it to be 90 days later (via Ops hub pro), then this affects your ‘deal push’ reports as this type of automation would push every deal based on your requirements.
So like others have said in this thread the ability to set the default close date (during deal creation) would be optimal to eliminate these ‘deal push’ issues and broader forecast reporting issues.