It's not a bad map honestly, the only changes I might make would be to carve the central Washington Valleys out of the mountains region, Ellensburg and Yakima especially. Also I don't think I'd include Lewis County in the South Sound region, I feel like they might fit in better in the south region. Pacific is kinda a toss up, it's not really part of the peninsula, but it may have more in common with that area than the south region, from talking with people out there I get the feeling they always feel kinda left out and forgotten, which is understandable because there are not a whole lot of people that live out there anyway.