I live in OR and find the "sporty" front fenders don't do much of anything. For the winter months here in the OR I just take some PET sheet that I bought and cut a strip long enough to span the entire down tube, and on my setup I find leaving it long up by the headtube also helps to keep the front spray under control, and about 3"es wide and zip tie it to the down tube. I also make it long enough to go under the motor area to keep the crud off of it.
It is on the bike in this pic but actually hard to tell it is there
I take it off all my bikes, which I haven't yet because it is still wet as heck here, for the dryer months and simply re-install in the fall when it inevitably becomes wet again here.