The studio made countless stupid decisions during the making of Alien 3 and in the end the only thing that mattered was the release date.
But I think that despite its weaknesses, Alien 3 is still a good film and deserves its permanent place in the Alien universe.
I also think it's a real shame that there isn't a making of book for Alien3 by J.W. Rinzler.
The reason is clearly that Alien 3 is not that popular and is generally considered a problem case.
From a financial perspective, however, it was not a flop and, according to David Giler, was just as successful as the first two parts.