Nah....my 2010 CAAD9 had that crank and I put somewhere around 8000 miles on that wihout a problem...and I'm a big dude. I wouldn't replace it until you have a problem with it.

Incidentally I believe I know the problems you are referencing and they're not epidemic by any means - similar to worrying about your Cervelo R3 frame cracking.....maybe, but probably not.