I'm not sure what you mean by basic. The Comcast in my area only has two non-digital packages:
Limited Basic - CW, NBC, CBS, ABC, PBS, My Network TV, Local Government Channel, and Discovery Channel
Expanded Basic - CNN, ESPN, Nick, SyFy, Disney, Disney XD, Cartoon Network, Animal Planet, History, Turner Classic Movies, AMC, etc.
Those channels have always been in those packages. Are you saying your Comcast moved SyFy into the package with just the broadcast channels? Or did they move it out of the digital tier and into the package with the other regular cable channels?