Sedum are not as leggy as yours, but that's not to say that yours etiolated. It could just be that it was growing normally, and for some reason had its bottom leaves plucked. Depending on the exact Sedum you got, the lack of sun stressing on the leaves means that it might enjoy some more sun
The other plan is to chop the stem in half, let the part that just has the stem in the current pot to grow more pups. The part that has no roots and an open wound, let callous over for a couple of days, then put it in a pot with soil. Water after 3 days. That way you'll have two succulents, and...
I have two plans, but you're probably not going to like one of them. Yes, you can move it into a bigger pot. Try not to mess with the root ball is what I'd say. Make sure that all the point in the stem that once were leaves, are now calloused over
Same. You should see me trying to buy eggs from the supermarket during the winter when pretty much all the girls had stopped. I was trying my best not to get noticed, because after supplying all the neighbours with my eggs all summer, it would've been embarrassing. The next time I needed eggs I...