Thanks for your first impressions. I'm also an original Droid Incredible user looking to upgrade. I believe the screens have the same pixel resolutions, but the screen on the Lucid looks vastly superior than it really is. Kudos to LG for that.
As far as battery life, I think it's been an issue for all 4G phones. Right now I'm debating between the Lucid, Spectrum and Rezound, all of which I've read plenty of battery life complaints for. I think what the Lucid has going for it is a smaller screen with a battery similar in capacity to the other two.
I have to imagine there's some sort of widget to turn off the 3G/4G connections as there would be for WiFi. Also, if/when the phone is rooted there may be some tweaks to improve battery life there as well.