I'm sad to see it go. Media storage can be done in a number of ways, but it did two things quite well adn easily for me:
1) backup all my pc's
2) remote access to my shares.
I've used the bare metal restore on 2 of my 3 PC's and it worked flawlessly (once I loaded the Realtek Ethernet drivers at least).
I had a crash on WHSv1 that was nasty, but after a few tries I was able to do the 'repair install' and save all my shares. I'm right now moving to WHS2011 (plus flexraid for the storage pooling and redundancy) mainly for the ability to back up the WHS OS drive.
Doubt I'll ever make my way to Windows Server Essentials 2012. At $425 that's not an option.
The EFI/GPT thing is concerning, but hopefully either MSFT will fix it in an update or someone will build a work around. Either way though, its not a big deal as none of my PC's are going to have big hard drives in them anyway. I am planning on getting a Surface though, so if it uses EFI/GPT that's going to be a problem.