Parrish will be a major upgrade to the offense. He's from a big-time program, so he's used to the pressure and speed of the NFL. He also seemed like a guy dedicated to studying and making himself better, as is the MO of most UM players. And I remember reading somewhere that a good 3rd WR can really open-up an offense.
As for Everett, just hearing he COULD play this year is good enough for me. I don't know if I'd risk using him, but if he's cleared to play and wants to play, so be it.