They should have just ended it as a trilogy with Kirsty as the protagonist once again, or if she only wanted to do up to the sequel then they could have left it at that as well, because the sequel had a pretty solid ending with the Cenobites realizing that they were once human and then they changed back. Don't get me wrong, it's cool that the have a whole franchise going on like the other horror/slasher classics, but it would have been cool just as a trilogy too. And personally, having seen the third one without Kirsty just didn't feel the same. I guess of course they did it to milk the Hellraiser movies and get a lot of money.