Riot, please but at least a week restriction on playing new champs in ranked when they come out!

Yes, Tahm Kench is a fun champion to play... but only for the person playing it. (right now of course) That is simply because nobody knows how to play him! I cannot count the number of times that a tahm in my game has rushed into a fight thinking they can just tank all damage possible because of their gray health and then they just die. Not to mention all the times they just eat you and then you get stuck in a very bad spot. Now tahm is a champ that has a lot of potential for some sick outplays, but riot please, when a champ is released, do not make that champion active for ranked play for at least one week.