Travel: Travel is non-stop, continuous, and burdensome on the soul. That said, all consultants travel all the time, but ATK is likely worse than some (Bain, BCG) and at par with others (Booz, Mck). A lot can be done to manage client expectations around this issue, and to optimize staffing for life as well as work.
Processes: ATK is an 80 year old start-up. AFter the 2005 buyout, the firm started from scratch. So we are still building core processes. Examples: We have pretty mediocre intellectual capital develpoment, dissemination processes and tools, pretty crap financial management at the partnership level (a pareto of partner contribution would reveal a long tail, i suspect), and not the strongest people review processe (although its getting better).