And Keldeo as 46? You've got to be kidding me. He is a great offensive option for rain teams. Tornadus-T can not be solely responsible for keeping his usage down ~_~
One reason for Keldeo being so low could be the unfamilarity with the water/fighting combo. The only other 'mon that shares this typing, off the top of my head, is Poliwrath and he's RU for good reason.
After picking up my Keldeo from GS this week I checked him out and was pleasantly surprised with his weakness/resistance chart. Seeing an old friend of mine all the way down in NU (Articuno) I know BST is meaningless with bad typing or odd negative ability, so Keldeo having nice stats may not bw enough to lure in people that have a negative image of his typing.
Just the two cents of a competative newbie.