Chuck, bracing and top thickness always have to be considered together. Being as you don’t have much experience to fall back on, you have to start somewhere and it looks like your bracing may be close to what you need, depending upon how stiff the soundboard is. Given my years of experience, I take my best guess at both the bracing and soundboard thickness then do the final top tuning, checking top deflection with with my thumbs or using the deflection jig, by carefully sanding the lower bout until it moves the way I want it to. This is done before and after the installation of bindings, if any, slowly working up to where I want it to finally be. I always start with a top a little thicker than it needs to be knowing that I’ll be sanding it along the way and checking it frequently.
When considering bracing and top thickness together, I like to err on the side of having the top a little heavier and the braces thinner than the other way around. I do not like extremely or dangerously thin tops. They may be loud but they lack the color and dimension of tone that a slightly heavier top and thinner braces will give you. The goal is to find the perfect balance between the two elements. Only experience, not tools nor jigs, can guide you here.
But remember, you’re stuck with flying mostly blind at the beginning, relying on what you’ve learned from other people’s experience. The deflection jig is only a way of recording and being able to repeat past experiences. I find as I grow older that I can not depend on my tactile senses as much as I used to but the numbers from the jig never lie.