You see how the lower/oldest leaves are kinda yellowish but not overwatered looking or anything? You’ll notice that lots of “old” succulents have more yellow colored bottom leaves. That’s bc as the leaves age, they produce less chlorophyll. The yellow color that the leaves take on is a result of the same pigment (carotenoids) that causes variegated plants to have that yellow color. Variegated plants can be very sensitive to sunburn because they don’t have the same protections that chlorophyll
I think the new growth looks awesome. The bottom leaves will eventually be absorbed and the “new” bottom leaves will be better adjusted to the more intense light. It looks very happy and I think will be healthy and happy in your rock garden. It’s just a waiting game for those bottom leaves to go. Leaving them on and just waiting for them to go naturally I think will be the best thing for this guy but if you hate the way they look you could always remove them.
Ive gotten I different answer from everyone I ask lol. Idk what to do. I've just moved it from the back patio to my front garden so it gets morning light with afternoon shade that could explain why it's seemed to get worse but ive noticed these spots for a few weeks now but they seemed like They were getting better until now. I dont know how to make this one happy.