I will be able to reply better to this tomorrow morning after my coffee and a good night's sleep, but................
if I understand correctly you are saying that you get this gigantic dart with what looks like a large piece of triangle coming out of the dart.
I am not too far from you, I have a 3.5" difference side seam between front and back, so I can relate. If I were to wear the right size bra it would be larger, but I am reluctant to perk up the sisters that much. My DD calls them beacons if you get my drift.
At least with the 3.5" diff I can hide them a little. I should be wearing a38G, but have stuck with the 40DD in this stage of the weight loss hoping that it I will lose more where I need to before I go down another dress size.
Yes, you will get the gigantic spear. It will diminish somewhat if you go for two darts - or a princess dart as Liana has suggested. But I have found that it doesn't matter where you put the dart in a princess seam. Separate it into the waist and bust or all to the bust area, it still is the same shaped side pattern piece, which is were all the dart intake is placed, in my personal experience thus far. If you do go for one dart, prepare for the spear. One way to get around it is to have a5/8" seam allowance inside the dart, which I have done in the past. This is instead of a solid fabric dart. And that is okay too, actually better than trying for a "normal" dart and having the spear. By creating a 5/8" sa, you eliminate that spear that sticks out.
BTW, I loooove princess darts for this very reason.
HTH, but if you need more answers let me know. I will check again tomorrow sometime.
ETA to add that on my last knit top I went with two darts instead of one and I liked the fit better than one dart. Try it on a test garment and see if you like it. It really is not as obvious as one would think. If you look here
on my blog, you will see the top with two darts. Actually I think that you can't see the darts, which I like. But your tastes may vary