I loved Voyager very much and Jennifer Lien too, but I understand why the producers do not renewed her contract. The character stuck and wasn't developed very well...I don't know which fault it was, but seriously...it was time to change something...and sorry for it: but Jeri Ryan's character was much more intresting (I mean not the hot appearence of her).
The strongest and best characters are Janeway, The Doctor and Seven of Nine. On Average: Torres and maybe Tuvok. The weakest are Kim, Kes and Paris (more because of bad actors).