Thats cool that you have the focus central rear kit. You do have the rear arms w/ the sway bar mount, huh? Just to add having the two tied together, the strut's & tower's, you better have a desent set of poly bushings for the top strut mount's. The added stress of the strut & coil in the tower, which I don't think is a issue, & the two= strut & towers tied like you want & a desent corner will add more stress to the top bushing. I'd add a Steeda 1.125'' bar w/ your F/C lower arms. That'd make a bigger difference. It'll really make your car rotate. Add a torsen & then see the difference.
Introduce Mr. Torsen to the mix
Bigger brakes then you- D23 crew- D-Tech- Sedan Revolution= #131