Yes, what are your numbers, as it makes a big difference. Willamette has been pretty generous this year, so I'm not sure if you'll have any luck getting more out of them. As for fighting for it, I think you can. I had a school do another look at my file and ended up with a scholarship where there was none (not great, so I didn't go).
Willamette offered me a full ride, but I've decided to pass on them. If it makes any difference to you, my letter of withdrawl should be arriving none to shortly. I ultimately decided on a campus out of state.
All I can tell you is the campus is beautiful. The law building is huge, off to one end of campus, and it's really beautiful. A small river runs through the entire campus, and its right next to the state building - so if you want into the Oregon government, you couldn't beg for better position. Definetly a great place to spend three years, and as I recall, their library never closes to students - which is a huge deal.
The were a little condescending to my wife, which dropped them on our list a LOT (nice wife, you stay at home while he goes to law school - sort of thing). And they messed up my appointment time by a DAY. But you can't hold the whole University responsible for one bad Admissions rep.
If you like Oregon, and want to stay in the area after graduating - Willamette is a really great choice.