Honestly, for some mets...yes. That would be a step up. Especially if it were WWL. Literally anywhere else in NOLA...probably not. Guess it depends on what floats your boat--tornadoes and hurricanes vs. blizzards and extreme cold in the winter!
I also think that, for better or worse, a lot of viewers in Philly (and Tampa, where she was before, for that matter) focused on Sheena's...style, rather than substance. DC doesn't work like that. This is a chance to show off her forecasting skills and not be ogled on TV. Doug Kammerer, who I imagine also fit into that "style over substance" category in Philly, did the same move, and it's worked out just fine for him.