I think Yu-Na will always have an urge to compete, because she is a strong competitor by nature

I'd definitely love to see her back in 2014, but definitely don't think she needs to compete in every Grand Prix circuit or World Championship from now until then to do it. I think that is too much to ask of anyone, IMHO. And that's not coming from just a spectator. And since I lost my ability to really skate again due to an illness, I'd hate to see Yu-Na or any skater wind up suffering an injury that takes them off the ice for good. We really don't know what kind of long term affects this type of training (3+3 combinations, 3As, 2A+3Ts, even the spins and positions required in spirals, etc.) will have on these young athletes. Women have not been competing at this intense of a level for very long, and the way it affects their bodies as they become adults, and eventually reach their 30's, 40's, etc. It's really a big unknown if it could be seriously damaging in the long run ... it's almost like seeing the medical trials of a new medicine and wondering what kind of affects it will have down the road and these young women are our guinea pigs for it.
Aside from that, I think Yu-Na also deserves some time back in her home country. I'm sure it would mean the world to the Korean people to be able to see their idol in person, performing shows there and not just competing. They have been so supportive of her, and Yu-Na has been equally charitable in her donations and strong in living up to their expectations... she deserves a victory lap in her home country, and her fans would love it.

Yu-Na would also make a great cultural ambassador for South Korea, much like some of the Korean idols of the past. BoA was hailed for her dominance in Asia, being declared Best of Asia, by her fans... but now the entire globe knows Yu-Na Kim and her popularity extends far beyond the Asian borders. Whatever she chooses to do, I'm sure she will make an impact.