Another of the edges that the FOW scene has developed on us is the 'no mirror-match' seeding system, at least in initial rounds. While the universe of 40k is much more tolerant of infighting, it nevertheless can make for a more interesting and worthwhile game when you get to fight someone with a different codex.
Depending on the Codex populations, we may set out to provide the first round with a seed that sees no Intra-Codex battling. As we recognize that this means that the first round may sharply divide into a SM vs. Other team match, we will enter into this decision warily.
Comment solicited and appreciated on the subject.
