Well, it was certainly going to be a long, tough series had they not won Game 4, but Phillies still would have been in control unless they'd lost Game 5. It did seem like LA rolled over once they lost this one.
Conversely, not to get ahead of things again, the Rays still believe if they'd won Game 5 they could have taken both home games. I don't remember feeling that way at the time but I certainly expected there to be a Game 6. All those games had moments that seemed "meant to be" (but we'll get to those soon enough).