Reverting core storage still works in Sierra. If the installation creates a core storage logical volume you can revert it to get partitions back to normal by running these 2 commands in terminal. diskutil cs list and then diskutil coreStorage revert lvUUID where lvUUID is the last lvUUID reported by the previous Terminal command. Then restart for everything to get back to normal after you have run these commands in Terminal. This is good if you want the recovery partition to show up in the startup manager you get when booting up with the option key.