I don't think they did a good job of balancing her and Seven together. Whenever the two of them interacted it was Seven that would end up dominating the episode, and just push B'Elanna out of the way.
I also liked the mother-daughter relationship she and Janeway had in the pilot, but they didn't do much with it after that, and then Seven came in and hogged all Janeway's attention.
Is the glass half empty or half full?
Seven didn't always come out on top. In season 4 I recall that wonderful scene where Belanna crawls into a jefferies tube to do some repairs, and finds Seven there rerouting power to her soon to be astral cartography lab. B'Elanna was rightfully p-o'ed and read Seven the riot act... then she realized SHE sounded like Janeway hollaring at a new chief engineer.
My fav B'Elanna/Seven scene was in season 7, when Seven thought she was dying and went to Engineering ostensibly to "work"... but in reality what she was doing was going to B'Elanna for comfort, and she got it.
TORRES: He's looking for you. The Doctor, I ran into him in the corridor. He's about thirty seconds away from calling a ship-wide alert.
SEVEN: Are you going to tell him where I am?
TORRES: No. I know what it's like to be stuck in Sickbay. I've escaped the Doctor myself once or twice.
SEVEN: Thank you.
TORRES: Any time.
SEVEN: Lieutenant. When you die, do you believe your spirit will go to Sto-Vo-Kor?
TORRES: You shouldn't be thinking about dying.
SEVEN: According to the Doctor's simulations any attempt to adapt the salvaged node will fail. Sto-Vo-Kor, Lieutenant. Do you believe you'll go there?
TORRES: I guess it all depends on how honourable my death is.
SEVEN: But you do believe there's something after death?
TORRES: I hope so. What about you?
SEVEN: The Borg have no concept of an afterlife. However, when a drone is deactivated, its memories continue to reside in the Collective's consciousness. As long as the hive exists, so will the part of that drone.
TORRES: You don't seem to take much comfort in that.
SEVEN: My link to the Collective has been severed for nearly four years. If I die, everything that I've accomplished in that time, everything I achieved as an individual, will be lost. My memories, my experiences. It will be as if they, as if I never existed.
TORRES: I think you're a little more memorable than you're giving yourself credit for. You don't need the Collective to validate your existence. You've made an impact on every member of this crew. That's your legacy.
EMH: There you are. I should have known
she'd (BLT) be the one to harbour a fugitive.
TORRES: We difficult patients need to stick together.
EMH: I want you to return to Sickbay immediately.
SEVEN: Have you devised a new treatment?
EMH: Not yet.
SEVEN: Then it's best that I don't distract you from finding one.
EMH: Seven, if you continue to exert yourself your condition will only deteriorate more rapidly. Is that what you want?
SEVEN: What I want is to be useful.
TORRES: I really could use her help. I promise not to let her overdo it.
I agree TPTB could have done MORE with the Torres/Seven dynamic, and since I like that "foster sister" relationship its the reason I based my fanfic upon it. If TPTB wouldn't give me what I wanted, I decided to do it myself.
http://www.youtube.com/watch?v=aQvkoo66vYI
[yt]http://www.youtube.com/watch?v=aQvkoo66vYI[/yt]