[{quoted}](name=Sona Ping,realm=NA,application-id=3ErqAdtq,discussion-id=IbQzrnb5,comment-id=000300000000,timestamp=2015-04-04T09:36:58.840+0000)
Because she isn't difficult at all. Pretty simple kit, Land Q, Cast W. It's just landing a skill shot.
The League community however....
She is quite tricky.
Her snare has a long CD, so you need to know when to use it perfectly, or else you're pretty much useless for 10 seconds (more or less). Plus early, the mana const is obnoxious. The skillshot itself is really slow and people should be able to dodge it.
Her shield needs to be timed perfectly or else it gets destroyed and the fight is lost.
For her ult she needs to be on top of them.
Not so easy, especially for a beginner (and the rating are usually a help for them).
meanwhile Yasuo has a "difficulty rating: 10".