So just an update. I found the 'Marked Men' mission. Apparently they moved the datapad from its previous logical location on the path to the next set of missions, to the inside of the House Rist complex which some factions have no reason to go to unless they know what they are looking for. Still not sure about the 'Ulgo's revenge' mission. No sign of him the cave he used to be in so I am guessing that's gone.