So weird - I used to have the worst of purple crab claws when I was much younger (teens - 20s) surfing up in GWS hood. Couldn't even grip a key when I got out of the water. And now, up here, I've had a couple days when it was cold enough that my hands got chilly in the water but am otherwise fine getting out post-sesh; no major issues. But a lot of paddling is involved so that might have something to do with it. However, if the gloves do make you paddle faster, that is worth considering. I seem to do a LOT of paddling (and can't forget the duckdiving) these days.
You don't need booties south of Zuma; maybe if there is a freak upwelling event. I have some old O'Neill ones that are at least 15 years old and hadn't been used in almost that long until moved north. Thickness of the booties? 3? 5? 1.8? No idea - I am as lost to that metric as board volume (liters). Glue starting to erode around the soles so may not have much life left in them. I fully expect them to disintegrate at the worst possible moment. I am impressed by their longevity but I will eventually have to get a new pair so I have something when they eventually fail.