They should have offered Angela a pay rise if that was the reason, but I understand they needed to keep their budget! :P
I've only watched the original 1990 film. I've seen little bits of the second one, but from what else I've heard about the 1992 sequel, it wouldn't stand up to its 1990 predecessor, even more so when I researched and found out that Linnie McCallister was recast. Why her of all Kevin's siblings?