Please reboot after applying.
You can find google keyboard with material style here (select material in "advanced settings"): https://drive.google.com/file/d/0B0kTNdHAiEbDZ0pCTUo3dWxUS3c/view?usp=sharing
If you dont like the new google keyboard, update the version 3 here: https://drive.google.com/file/d/0B0kTNdHAiEbDTERUaEhucXRwRTQ/view?usp=sharing