re- the 50-pin data connector....don't get carried away by this, they're standard stock items, and the incremental sizes may well mean that , for example, you have 31 wires but the connector increments are 30-pin or 50-pin (would give you 19 "spare" pins)
Were the individual sub-cells to beindividually controlled(even if only with a fusible-link) the battery would still be able to perform it's primary function-emergency power-albeit at slightly reduced capacity....isolating a whole cell , not only reduces the capacity,but the output voltage....not good!
As designed at present, that doesn't appear to be an option as the inter-cell straps are bolted directly to the cell-terminal with no alternative switching to bypass a faulty cell.
I stand by my opinions expressed before, re-design/interface/quality. of all but the GS-Yuasa products which I believe to be beyond reproach.