Managing a large battery is effort-laden, there is no doubt. It's one of the reasons for "right-sizing" the battery to reflect consumption and reasonable charge cycles.
IMO, installing a very large battery in order to provide several "days of autonomy" is a two-edged sword. Installed cost is high, as is maintenance effort. Bottom line, all energy used from the battery must be replaced, and for lead acid batteries, the sooner, the better, as being left in partial state of charge contributes to shortened service.
Many of we off-grid folks live with our systems full time. Solar PV panels operate on a daily cycle. It makes sense to maintain the battery attuned to that daily cycle. What gets used from the battery gets put back the next day.
Were this my system, I'd take the following steps:
#1 Assess daily consumption.
Get a good picture of the average usage in Kilowatt Hours.
#2 Size the battery to to support the average daily consumption.
The large number of battery blocks, and attendant connections, make for a high-maintenance battery. Imbalance between cells caused by slight charging variations, corrosion on connectors, etc., inevitably leads to accelerated deterioration of some blocks, and shortened battery life overall. I'd go through the exercise of testing each battery block for health. Measuring specific gravity of each cell is the most precise, but a simple open circuit voltage test will suffice. On charged battery blocks, the lowest readings will indicate the lowest health. Select the blocks with the best readings, and reconfigure them into the battery. A useful target would be a battery capacity that would discharge 35-40% daily, with 50% being the maximum discharge.
I'm only guessing here, but think about half or more of the blocks in the current battery are likely nearing end of life or have dead cells.
Use the best, corrosion-free conductors to reconfigure the battery. Conductors that have the same current carrying characteristics. Having mixed conductors is a recipe for shorter battery life.
Its going to be a good deal of work, but in the end the system will be far more stable.