This skill has allowed players to ranked up and even reach KoG. A very flexible skill that can be used to variety of decks. It is even used by players who reached top ranked in previous KC cup. Highly recommended skill to all.
@ anon: they are giving it a slight nerf on the May 23rd update, you will need to lose 1000 lp before using it, as opposed to being able to use it for free. It's about time, as Switcheroo is WAY over-centralizing, and they probably saw that when 95 out of the top 100 decks in the KC Cup were Switcheroo Bandit Keiths. It'll still be highly viable, but will make way for more creative deck builds.
If they're nerfing this skill again, they also need to fix it because the way it draws cards is not "random", it's crap. Here's what happens:
70% of the time, if I send Card A back on Switch 1, I will either draw that same card next turn, or I will get it back the next time I Switch.
20% of the time, I get the exact same card I tried to switch. Not a different copy, the same card.
10% of the time it works the way it's supposed to, and even then it isn't guaranteed to help. I don't think this skill is anywhere near top 5 anymore. If they fix the probability on switching, then the 1000lp cost is fair enough, but you should be able to use it 3x. There's already a card that lets you do it every turn.
Personally I don't like this overused skill that much. I think many players don't know how to use it properly since they always use it during the 1st and 2nd turn automatically. Now the use of switcheroo will need dueling feeling and skill of players.