[RarlyL8]

I recently changed out my rear tires/wheels to get a better aspect ratio look. After the swap I noticed the car drove a bit differently but expected that as the new tires are 1" taller than the old ones. All was good until I met up with a blacked out Z car on the highway yesterday and did an off ramp run with him. When exiting the off ramp I quickly got well into the 3 digit mph, then felt the handling get pretty unsettled. Once out of the curve and on a staight line all was good. I cannot describe well the feeling other than the car did not feel tight and planted like it used to, but rather squirmy or soft.
What can cause this?
The tires are now 1" taller which throws off the front/rear bias.
The tires have a shorter sidewall which should tighten it up.
The tires are Nitto drag radials on rear, Fusion performance street on front. Chose the Nitto because the tread pattern looks very similar to the Fusion. The 15's were Pirelli P-Zeros.

Here is before and after: