I had the same problems, bottom left menu button no longer takes me to my settings where I could quickly change sounds and notifications and check data usage. Now it's like three extra steps to drag from the top down and find settings icon. I just don't like it.
My widgets disappeared, too. My daughter was able to "fix" it, though (have no idea what she did, but they're back on my homescreen again) but now widgets and apps are not in same place so makes it more complicated for me. :-(
And I absolutely hate the new colors, especially the texting colors. ICK! This is the absolute worst component for me!
If I could go back to the way my phone was before this update I'd do it in a heartbeat!!!
