That was a good call, IMHO; I really hate the new love interest a movie thing, esp. since it undermines the investment in the previous story.
(IMHO, the idea of Janinie and Egon as a couple was so underplayed in the original movie -- not to mention Egon didn't seem interested in the first place -- I think it's real easy to miss, so I think they were safe in scrapping that.)
I dunno; I'm very casual in my enjoyment of the original and I think it looks like fun.