I would encourage you to go back to the track system the the Sea Class had on it under prior ownership. Snaps allow water in under the blind in rough conditions-not much, but enough to be annoying. Snaps break, and the male connector's get bent out of round over time. The cordura blind material will also contract in cold weather, as well as over its usable lifetime, rendering some snaps inaccessable ( I have had to relocate a pair on my boat at the junction of the side and front panels) and/or they are a bugger to snap in place in cold weather during set-up. The webbing straps are fine in black, they stand out more on this hull because it doesn't have the WWII camo gel coat to minimize the degree of contrast.
The minimalist top opening on the TDBs is a big plus, compared to other competing duck boats that have very steep angled and shiny pop-up blinds. I would focus on the rain roof improvements. Going with the track system for the blinds and interior decoy curtains enables the blind erection to be made quickly, as well as keeping the blind panels tight (this is a real plus when grassing to match the background).
I would also drop the motor one hole to maximize the hull's tracking, by lowering the cavitation plate on the motor's lower unit, when you are backing through a decoy spread during retrieval...as well as considering use of a four blade to maximize hole shot (depending on pro-pitch employed you will lose some or a lot of top-end speed). I prefer a boat that can jump on plane and maneuver in mixed sea cross-chop over a boat that emulates a Roy boat, since there will be far fewer instances when WOT is needed or makes sense to achieve.