This open a chance for them to put miniatures with JOURNALIST N1 and N2 like the one in Aleph and the Doctor Engineer Journalist of combined army. So you could expect to have for example a maya celebrity with this rule for several armies or journalist for each faction, even journalist profile for miniatures on several factions. Seem useless but it´s fluffy right i love that rule and want to acomplish ever. could be the difference between victory and death :D
That's so hard to quantify. What if they all played against weak opponents? What were the missions? What classifieds did they draw? Winning a tournament just shows that player was the best player that day and had favorable matchups and good dice.
That's why we're talking about "how often they win" as opposed to "they just won something". After filtering out things like newbie tournaments your best bet is to rely on statistics to take care of flukes like that. You need a considerable sample size for that, ofc.