So bought Pyke and played him in both normal and ranked games. Here are my initial thoughts.
He is fun to play and medium difficulty to learn. He is ultra mobile, something that I personally like. As a support, he lacks heal or shield to allies but it has a stun (dash) that is not the most reliable.
I would say his position belongs between bot lane, the river and a part of the jungle.
His late game is something I’m not quite sure yet if strong or meh.
I tried him tanky in a way I would build Shen and it went well.