A pretty good run down of the changes in the link below. The SOX get a nice nod and I wasn't aware that Don Cooper switched his jersey number to 99 in honor of Kevin Hickey.
I personally like the Cardinals red caps on the road because I like how it matches up with the red trim on the gray uniforms like they wore in the late 80s after switching from the powder blue uniforms. I like that they kept the blue cap with the Cardinal as the alternative. I'm also looking forward to seeing their "St. Louis" alternate jerseys.