Nice work Pepe!
Mr. Brooks - How are you doing! I don't know for sure about how the alteration of the fans would affect tone per se. But doing this (focusing at the 8th fret as opposed to the 12th) will decrease the cross-grain stiffness of the top.
Many of us, musicians and luthiers, have seen (and heard) the affects of increased cross grain stiffness, as seen in a lattice design, which can be considered extreme perhaps.
Yes, I would have to say that all things being equal (which they never really are) braces that are more parallel to the center line will tend to warm up the sound. I throw around the term "darker" because everyone else does, but I prefer to use the term "warm."
Experienced luthiers will adapt thier bracing (or other features) during the building process to accommodate the characteristics of the top wood.
By focusing the fans at the 12th or 14th fret, the sounds can be tightened up a bit.
Do you agree Pepe, (or anyone else)?