I think Tyson Griffin can make quite an easy cut to 145.
Stevenson is eh, but I think he'll make it without much problem. He's pretty short.
I think Kenny CAN make it...and won't have too much problems there, but he'll still be weak as hell. He needs to do some weight training and move UP.
As for FW, I've always loved the division, however it's suffered a bit from the top dogs being all over the place...it won't be truly a complete division, in the UFC at least until they acquire all of the top talent.
Hioki, Sandro, Flash, Warren and Takaya are all out there still.