I am now the proud owner of all the new washes, and to be honest, I wasn't blown away by them after they tossed the inks for them. Sure they can fix cloth and skin very well, but they do basically nothing for metallics, which is a shame. Nothing comes close to the old ink Chestnut for me, it was one of the best things GW sold.
However, I am getting to like the new washes. For skin they are good, and as i said before, they work well with clothes too. I've used Baal Red, Leviathan and Devlan Mud on my Vlad so far, and it looks good.
As for foundation paints - All Hail Mechrite Red! One of the 3 foundations I have, it works so well! Tastes awful mind you. And all the new washes taste Terrible! Do Not eat the washes!