If you already have a dropper seat post (30.9mm or 31.6mm) and you do not want to fork out for a new 34.9mm dropper you can buy a sleeve to allow your 30.9 or 31.6 to fit the new Levo seat tube.
The photo below is the sleeve that came with my SWorks Enduro which is the 30.9 to 34.9 version. I am sure Specialized will sell these as a separate item or if not use the link below