As I read it and am experiencing, I selected yes for global channels. I load up a preset. It shows edited. I play with the setting, and just like always, if I don't save the preset, nothing is changed. If I choose to save the preset, it only saves that preset, not all the presets. I can move to the next preset and play all I want, and choose to save or not save.
Since I liked the new curves, and never change the actual factory presets, because I save to a new location, I installed the new version 11 presets. I can still modify any of the blocks in the presets just like always.