Latex for briefs? Ah, the idealism of youth. (I was going to revolutionize legal research through artificial intelligence) Most lawyers don't have the time, and almost every court I practiced in had rules specifying a utilitarian uniformity that made fancy formatting superfluous.
I would agree. I think using Latex for a brief is likely to get a deputy clerk sending you a notice. District Courts will have local rules on formatting (with California having the oddest one I have seen yet).