I'll just echo what many of you have already said.
Despite the reasoning for adding Jeri to the cast, be it T&A or whatever else, I feel that her portrayal of 7 really transcended that.
I see a lot of criticism of Voyager all over the Trek boards, and some of it is probably deserved. But it's the strong character work, especially with Janeway, 7 and the Doctor that keep me coming back to the show.
I like Kes as well, and I'm sorry that her character wasn't kept on in addition to 7.