You seem mighty infatuated with charging the 3 cells above 3.4V where there is maybe .5% of the total capacity. If you set your charge voltage to a voltage BEFORE any of the cells run away, you will get 99% of you battery capacity. (this is not the first time this has been suggested so it won't be the first time it gets ignored)
Who knows, maybe after successfully cycling a few times, the batteries will become better balanced with the aid of the BMS balancing.
And yea, i know you paid a LOT of money for a new battery that was supposed to work better, and that sucks. But you have options to try (conservative charge profile) to get 99% of your capacity with very little effort. Maybe you find it good enough to keep because returning batteries and waiting, or ordering cells and waiting.. is not on the fun list.
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