I want to love my brutes. I really truly want to. Sadly though, they don't feel like they have much of a role/use in any of my lists. Five brutes don't do pretty much anything in my many games and for the cost of ten brutes, I would much prefer to have the fifteen 'ardboys since they are much less likely to flee, get a better charge bonus, hold a zone better, and just seem more reliable and useful. Sadly the other issue I have with brutes is that for just 20points more I can have gore-gruntas, who are way faster and deadlier.
I'm not sure how to make brutes more useful with our current book due to the fact that we only have three units to pick from and they are all similar in points so they have to compete against each other and gore-gruntas are just too great at the cost and ardboys are such a solid block of troops.