I like the bridge deck...one of the reasons that I was drawn to the 323. But it, combined with a dodger, does make moving between the cockpit and cabin a real chore at times. I find it most troublesome when fully suited in fleece to stay warm, covered with foul weather gear, and topped off with a pfd. Add a little heel to the boat and the transit between cockpit and cabin gets to be a real commute. But, as Dolce Vita said, it gives great peace-of-mind...especially when running in big seas.
I have also found that the top step of the companionway stair makes for a perfect seat for long night passages or in nasty weather. I slip in the lower wash board for a back rest, tuck myself in under the dodger with a steaming cup of coffee, prop my feet on the bulkhead forward of the nav station, and enjoy the ride.
If I were to make any design changes I would not touch the bridge deck. But I would consider raising the boom a few inches to allow a higher dodger that would make it easier to take that first step when going below.