Yes, there was one brief look of Wanda in the future. It was on the last episode and it mentioned something about Wanda (and the Brotherhood, of whom she was a member) becoming allies. Wanda looked older, her hair was slightly longer and her costume, while similar was still slightly different. I think she still had the long red coat though.
The other interesting thing is Wanda wore this long red coat with black top many years ago before the movies (They may have watched this and borrowed the idea for the look for the movies). We did not get to see a power signature from future Evol Wanda, though. The entire scene might have been 2 seconds.
Yes, I thought the blue should have been Jean's signature (if not pink or orange), but for Jean they did not give any color. It was a clear visual, if that makes sense. Maybe they felt that the blue powers offset all of Wanda's red or that they kept the red for Cyclops.