Same reasons I went back to square setup, although I do like the look of staggered setups a bit more..I love the way staggered setups look. Mine weren't available in the size I wanted. Square setup has some advantages though like tire rotation and if you ever have a blow out you can swap a front to the rear. I did something a little different. 255s on the front and 275s on 19x10s all around.
305's in rear is very sexy.. but cost is crazy.Run the 285 square. Staggered fitment is a waste of time in my mind unless it's a drag car.
Personally I like a 275 on a 10 inch wide wheel, it looks very "supercar" and they are affordable in any wheel diameter.
I need a visual in that..I run 275/35/20 square on 9.5" width wheel with 45mm offset.. They have more than a wide enough stance and height for my particular application purposes.. No complaints at all.
285 square here. Handles awesome but a lot of tire noise.
Unless you're running skinnies up front for drag racing or have the rear tubbed to run something crazy like 345s back there, I see zero benefits to a staggered setup.
From a handling perspective, the S197 chassis needs all the front tire it can get. And from a straight-line perspective, the difference in ET between a 255 and 305 on the front is going to be negligible, unless you're chasing that last tenth.