Nope.
2.0 had everything I needed and more.
2.1 was nice but didnt really make my phone more functional. Mostly it was just pretty stuff I noticed.
Battery efficiency is nice but thats something they should always be working on and I shouldnt need a whole new version just to get it. They should upload small patches for hardware improvements and tweaks.
As an example, a way to use the LED on my Droid as a flashlight. There are plenty of 3rd party apps to do this, but it should be a basic need. I havent had a flashlight since my Nokia 1100, and I missed it.
If its an issue of burning it up, add a way to vary the intensity a little. Despite the fact that diodes generally need a set voltage to work at all, I can do this on some of my finer LED flashlights like the Surefire L7 Digital. The variance isnt extreme, but enough to save a little battery life and for all I know, extend the LED life too.