What do you WANT to do?

If you like it at Eagle, stay at Eagle.

If you want to fly for a fractional, go to a fractional.

Personally, I think any FO who stays at Eagle longer than necessary is wasting their life away. But that's just me. If at Eagle, you can live where you want (their bases most likely aren't in danger of closing anytime soon) and QOL is more important than income or advancement, then staying at Eagle might suit you. There are a lot of people who do (stay at Eagle).