It's fast, wall running does let you get around well, though depends more on the map, but it does make everything a bit.... too ridiculous, maps with a building with 8-12 windows on each level of 3 levels. It's a bit, "they can come from anywhere". Realistically no matter how good you are, you can cover 2-3 entrances to a room, but not 30.
It's fun, but okay there shouldn't be loads of variance, but every game on every map is the same, feels the same. I think the go anywhere wall running is too easy, it should be really difficult to make some of these jumps, and too many buildings with WAY too many entrances.
So far, I just don't like the Titans, playing in them, it's not that fun for me.