I was thinking the exact same thing - it doesn't look like it has travelled up the leg but it is also not yet 'pointing'.Kris, this might be a really dumb idea & you know heaps more about treating this than I do but have you tried drawing ointment on that? otherwise known as ichthammol ointment.
The best way to get an infection like that to point is soaking (which I think you are doing) and ichthammol.
Now the problem with the above is that is true for all mammals, I know chickens pus tends to go hard (like bumble foot) so I am not 100% sure it works for birds.