How can I neatly take washer waste around the downpipe?
It probably should have been done using 45 degree elbows, in the first place, but honestly I think that it looks better the way it is than it would if you had a bent piece of pipe there. That would really look like a part-time fix. If it's not clogging, I'm really curious as to why you're wanting to make a change until you can directly run to sewer line.