What I’ve experienced over time is that some people don’t want it to show on the full post view while others do. It’s a no win scenario for me…lol :S
Technically, the featured image is used for the intro part of the post and then it let’s the person have a complete different image (and size) for the full post view.
All that aside, I just created a new theme option and tested it as I was writing this reply….took me about 10 minutes, but it looks like Celestial Reloaded now has the ability to enable or disable the featured image when viewing the full post. Before I create a public release of this new updated version, would you be interested in trying this out? If so, contact me with the Email Support link on the support page footer.