Notes are available here
 
Wow.  Zerg just cannot get a break.  Roach going from 1 to 2 supply is pretty huge for the early game.
 
Not sure what the point of the forge changes are, but ok sure.  Make cannons easier to deny?  Not really sure what they are hoping for with that.

I'm guessing the forge was too strong, and made too good a ramp wall, or something like that. Hadn't heard anything about it though. The Roach change sounds reasonable to me, given how strong Roaches are and how easy they are to mass early on.
 
The change that I really appreciate though isn't listed here, but it's the decrease in the Thor's size by 2/5ths. Given how slow they are, and their inability to cliffwalk, their old size really gimped them.

" Notes are available here  Wow.  Zerg just cannot get a break.  Roach going from 1 to 2 supply is pretty huge for the early game.  Not sure what the point of the forge changes are, but ok sure.  Make cannons easier to deny?  Not really sure what they are hoping for with that. "

roach's are ridiculous early game anywas so this is a very welcome change imo

I am super excited about smaller Thors.

Oh man, I hope that "crash" fix is what I think it is. It's such a pain in the ass to have to ctrl+alt+delete anytime I want to close the program. 
 
Edit: it is indeed. Happy days! Also, the new Thor is still pretty substantial in size. It's quite humorous to see it being transported by a medivac.