*Offset the seat for the co more to the middle (make it laterally adjustable?). I'm a big dude and more often than not I have to sit half on the seat and half on whatever is in between the seats so that when running through chop the keel is the first thing hitting rather than the hull on my side slapping down. This will definitely help with test rides.
*I like the idea of tackle storage on the port side and deep in the middle (Balanced an Low!)
*Built in bump buster for the Trolling Motor
*Cooler next to livewells