Well, concealment roll could use some slight tunings imo but nothing too big, the main issue I have with these is that they'll desync whenever they roll on a slope...
Apart from that, make those huttball trap affect them, like they affect everyone else. Seeing an operative roll through the flames is very frustrating since, unless I'm wrong, it's the only ability who is certain to avoid the flames damage. In the end it's more an adjustment of a map rather than the class itself...