Make sure you're running the latest update to 2014 (188.8.131.52) as some things were made a bit better.
You can change the interface color overall in the preferences. Adjusting the grey colors may help you see the blue better.
There have been many discussions about the new color on these forums and the AE team has mentioned that they are aware of the issues some people are experiencing with visibility and I'm sure they'll address the issues soon.
No. You're stuck with the colors you have for now.
Adobe has promised a fix to that in an update scheduled for "the spring". So look for it any time between March 21 and June 21, I guess.
Damn, that is a shame. Luckily I still have 2013 installed and I only need 2014 for this one project ( I suppose I could always backwards compatible the save) otherwise I'm not sure how long my eyes will last with the new colors. It seems all wrong. Highlights are in the least highty color, things like rulers are in bright white and there is far to much negative space around icons and tabs. I feel my eyes drift away from where the should be looking. Role on spring and hope there is some improvement.
Hey, I'm now running AE version 12 at work -- AKA the original CC, the only one the Home Office currently allows us to have -- and I've tweaked it so it looks a lot like the user interface shading used WAAAAY back in AE Version Number Three.... and I'm not talkin' CS3, either.
I think Adobe got it right the first time when they came up with the original user interface background colors. I can't stand that flippin' gray stuff. It's a pain in the butt visually, as far as I'm concerned.
I can't stand that "oh, so cool" light type on a dark background since it is oh, so hard on my eyes. (It's also really old hat as a default.)
I don't know whose idea changing the color environment was, but don't let them near such decision making again and restore my control over an easy to read dark type on light background environment.