No Flex turned on. Or rather, it doesn't matter (I think), as that seems to apply only to the actual Flex Quantization, done on the audio file, rather than the Quantization of the actual regions, as done in the Event list.
So, if I turn on Flex, yes I get the Q option in the Region Float, but it will apply to the Flex Quantize, not the Event List Quantize.
So, what I want is more Q options in the Event list (more than Swing A, B, etc), and also the secondary problem (related or not) of the "Copy Value To All Following Events" not working..
PS, I found a workaround to the first issue. Turn on Flex, Quantize in Slicing mode, Slice at Transient Markers, Turn Off Flex. Not as elegant and of course doesn't work if I'd like to change things.
PS2, I'm wondering if this has to do with region placement not being relative, the same way the transients in an audio file (or notes in a midi file) are. Because Swing D is an absolute position, whereas Q-Strength has to do with the original timing, which might not be "remembered" by Logic in the case of regions.. Does that make any sense?