Hopefully this quote from the master himself will help quell some of your fears:

TheTVaddict.com: So how different is it working with the new regime at FOX, in contrast to what happened with FIREFLY?
Joss Whedon: It’s a completely different energy then the last time. FOX understands what it is we’re trying to do. I understand clearly what they want. And while there’s definitely a back and forth, there’s a collaboration. Not just people glaring at each-other.

I feel really good about how they plan to position it, and their feeling about it as a concept and as a show.