One other thing that might be worth trying is changing the angle/position of the hoods (I'm assuming you spend most of your time on the hoods). There are two ways to do this - one is by rotating the handle bars a bit up or down. The other is moving the hoods themselves on the handle bar ( bit of a pain since you'd probably need to rewrap your handlebars after you find a new position that works). Like all bike adjustments, best done in small increments until you are sure you've found something better.
I've also found that my (SRAM) hoods are most comfortable tilted towards the center of the bike a bit. My older Ultegra hoods seem most comfortable pointed straight down the road. YMMV, but all of this stuff is adjustable - a good thing, unless you can't figure out want to change next!
JB