These are some random thoughts, not necessarily in any order of importance:
Why don't you want to try the Copaxone? Unlike Avonex, Betaseron and Rebif, Copaxone is NOT an interferon, and many people use it without any side effects. Yes, it is a daily injection, but once you learn how to do that, it doesn't seem to be much of an issue. The main side effect -- a shortness of breath about 15 minutes after the injection -- doesn't seem to happen to every one, and certainly not every time.
If I were in your situation -- scared of the interferons (Avonex) and faced with Tysabri -- I'd certainly try Copaxone, first. The Tysabri does show promise in some folks, but after the brain disease episodes, I'd be putting that as a "last resort".
I can't speak about the IV therapy. That is a "new treatment" to me. I've had MS for a very long time, have been on Betaseron for the last 13 years or so, and am doing OK with it, so haven't explored the IV. But I don't think it's as simple as: "Do the treatment once a month (or whatever the cycle is), and you're fine." My experience with MS is what you describe: have an exacerbation; recover from some of them, but have residual symptoms that remain between them -- the most common being fatigue, weakness in limbs (for me it was the legs, primarily), numbness, tingling.
As for your doctor: I'd hate to be a doctor these days. Seems like patients come with two schools of thought: 1) Tell me, doctor, what you want me to do, and I'll do it. or 2) DON'T tell me what to do! I've done research on the internet and here's what I want to do. Support me!
It sounds like your doctor is trying for a middle ground: "Here's what I recommend, but you should do some reading and research and if you're comfortable with that, let's do it." You've had a bad experience with Avonex, and apparently told her you don't want to do Copaxone, so she's giving you the alternatives, and saying, "OK, then, which of these would you want to try?"
Some symptoms are treatable, some aren't. Not all patients respond well to the same treatment used on other patients. Often it is a trial-and-error -- if one med doesn't work, you'd be telling your doctor, and ask if there are alternatives. I don't use Provigil, so can't speak specifically about that, but know that not all the meds used to treat fatigue work well for everyone. Same for bladder control meds (Ditropan, Detrol), and some of the others.
You say "some things she will treat while others she will not, even though they are so similar". Can you be more specific about that? What YOU might think are "similar symptoms" may in fact NOT be similar, and might not respond in the same way.
Finally, not all symptoms are treatable all the time. Sometimes a med will work one time, and not work again, even though the symptom seems the same. MS is a very unpredictable disease, and responds inconsistently to treatment. A hard reality, but there it is.
Congratulations on your baby. 8 months old, huh? He'll be a reall challenge soon, when he starts walking around and tearin' up the joint! :)
...I am not a doctor, nor health professional, and don't pretend to be one, here.....