[FaeLenx]

Not necessarily. More numbers is bad depending on how the game is scored. Let's assume that it's going to be a simple matter of countings wins and losses.

Let's assume that there's two sides with exactly 2 really good PVPers each. They each fight in 1v1s and they tie each other with 1 win for each side.

Now let's assume there are two sides. One has 2 really good PVPers, and the other has 2 good PVPers and 18 really mediocre ones. The 2 good PVPers go to score 1-1 for their team again, but that winning one for the smaller team goes on to 1v1 the other 18 people and win because he's just that theoretically good. Suddenly, because that team has 18 opportunities to score points against them, more people is worse and the smaller team gets 19 points to the other's 1.

More people is often bad for your side unless they're a reasonably strong combatant who has a chance of beating their likely opponent. This was demonstrated in the war games that used the simplest rules to see how people would handle it where one person was around 80% of their team's defensive participation because they were just the better combatant. We don't have MMR in SL2 so there's no real way to make sure people are taking 'fair fights.' Trying to force 'fair fights' would be nearly impossible as well.

The alternative to numbers being a detriment is to allow them to be an overwhelming force where you can just 4v1 your enemy team all day every day. That would make some of the worst actual gameplay though so I assume you didn't hope that wars would be fought this way.