There are always beginners or people who have had to start over who appreciate such things!
MC, there are usually several rounds of picks at the swap, and there is also a "free" table. Each round you get to choose one coral, so your chances of getting something awesome are great, and there is always plenty of the easy corals left at the end, so you don't necessarily have to "waste" your turn on xenia, because there is always some left at the end, not to mention macro algaes, snails, and random livestock items...
I responded to your post in the other forum as well.