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What capacity is your bilge pump? If the pump is too small, it'll never catch up with persistent conditions once water starts to enter the boat and make it sit even lower. Too small a pump running constantly will run your battery down quicker than a larger capacity pump that at least has a change to pump water faster than the boat takes it on.

If your transom sits low, I wouldn't hesitate to reposition the batteries forward to the CC. I moved both of my batteries last year to the CC and my only regret is I didn't do it years ago.

I have a chart for the Berkshire marine cable I used...

2 AWG = 0.292 lbs/ft
1 AWG = 0.305 lbs/ft
1/0 AWG = 0.450 lbs/ft
2/0 AWG = 0.550 lbs/ft

With 35' of added 1 AWG cable, the extra approx 11 lbs would seem relatively inconsequential especially given the benefit of moving maybe 100 lbs of batteries from the transom to the CC. Maybe splash guards for the transom might help as well. Are you moored so the bow is always allowed to point into the wind?