As far as I understand the horny bits were developed somewhat separately, so I'm not sure how much more ready Act 3 would be without these.
There were screenshots on reddit of one of the lead writers saying they wrote Haarlep, so obviously that time could have been used elsewhere.
Oh, I meant the technical part of game development itself, there are a lot of half-finished dungeons and lackluster fights in Act 3. Maybe there would be a little bit more party banter.
