Your glass work is very clean looking!
I am of the opinion that there is no such thing as too much tabbing. Great looking transoms and stringers don't work so well if the connection isn't robust. Those "tabs" help keep the transom from moving so much by tying them to the stringers. Outboards spend their whole time trying to tear the transom off the back of the boat, so more strength where you can hide it in the bilge is good.
I was taught to use smaller strips on inner layers, and wider on outer layers. As if you were using 2,4,6,8, 10 and 12 inch wide tapes. And I wouldn't be afraid to use mat on compound curves or between layers if you use it to better spread the load across the compound curvature at the intersection of the tops and sides of the stringer to the transom. The alternative is very generous curvature at the intersection so you can get fabric to drape. (Think of using a bowling ball to make your cabosil fillets)
That's just an opinion based on memories in composites class at university almost 20 years ago. So take it with a grain of salt.
By the way, if you have a sandblaster, that is way faster than sanding between layups, but you have to be good with a vacuum for cleanup.
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