My experience installing 3.7.3 on my Lenovo X1 carbon with Ubuntu and Elive 3.7.1 previously installed in legacy mode (dos partition table). I Installed using options offered by the the installer like any newcomer would.
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installer asks update 3.7.1 --- No
2)partition disk? ---- No, already partitioned
3)select partition for / ---- OK, choose previous btrfs for 3.7.1 -
You need gpt boot partition > 200mb ---- F*ck !
Hit cancel and restart Install to create some space. Actually we need a "Back" button IMHO.
.......
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Same as before
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partioner? --- OK, open gparted.
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create /boot (ext4) 280Mb
4)select / --- OK
5)select /boot --- OK
6)select /home --- OK
7)You need 200Mb EFI partition ------ gaaaaaahhhh !!
--- I subsequently hit Cancel again, to start over again.
But: Installer simply continues without EFI partition. WTF?? 
8) GRUB reports problem due to BIOS type partition but all moves on.
9) Congrats, Elive is installed
After which a reboot has Elive grub and boots just fine... Next time I'll hit OK at point 7 to see what that gives.
Other than some shutdown problems (watchdog after shitty suspend) most gripes are Desktop gripes and IMO for a separate thread.
