I'll give you an A+ for effort and design but a C- for taking constructive criticism. I think just about everyone liked it but wanted to help you improve your design. The stiffening you may have gained is due to the fact that you have somewhat stopped the strut tower from flexing in towards(side to side movement) each other now with the bar going across. The Maximum motorsport design Mike was writing about ties into the fire wall to help entire nose from sagging in towards the fire wall(even though it isn't much) and angled flexing of the strut towers when doing high G cornering.
The strut towers on the fox are really far from the fire wall which is what makes the front even more like a wet noodle. Think if you could push the car down with your hand from the roof, the strut towers would start to lean toward the fire wall has they kink in, this happenss over dipps and twists in the road.
Drive with your fingers just touching the outside window frame where it meets the roof and you will feel the gap open and close(almost squashing your fingers) has you drive around corners that is how much this car flexes, but after I did SFC's that gap moved far less, to tell you the truth a great way to tell that the SFC's and strut brace does work. The design you have you are to close to the strut tower with the rear brace, giving no bracing force to stop the strut towers from dipping towards the fire wall, the core support flexes like hell so the front braces will move with front sheet metal. so yes again you gained side to side stiffness, which you would feel, in my opinion you are 1/2 way there.