Coming from a Galaxy Nexus, this will be an adjustment. There are features in the ROM i'm currently using that I KNOW I will miss (custom quick setting toggles, lockscreen shortcuts, long press lock icon for torch, ribbons, halo... stuff like that).
I really don't care THAT much about an unlocked bootloader. As I understand, the only thing you CAN'T do with a locked bootloader is flash kernals, which means you can't run a version of android higher than what has been released? I had a Droid 2 that was bootstrapped, and I was OK with that. I just got nervous when I saw people weren't even TALKING about ROMs yet. I will be patient, I'm just hoping someone comes up with a solution.
Anyways, I'm excited about the battery life, and that will offset my missing features for a little while!