Judging decisions based on their foreseeable consequences, I presume the intent of the WvW seasons is to discourage players from fighting each other in WvW. The structure is stacked to reward players for fighting NPCs and creates punitive disincentives for fighting other players.
Of the 19 achievements, you get 2 from killing other players, one of which is set trivially low as a freebie. All the others are more efficiently achieved by avoiding players: play during the off-hours, ninja supply camps, but avoid fights because those will slow you down except for the couple of achievements you are certainly going to get just from the PvP fights you cannot avoid. There are no rewards for defending and 1 for repairing, which again is a one week (or one long night) achievement.
More so, you are trained to avoid other players because of the crushing population differences. When you have the “outnumbered” buff in your own borderlands, you can work out your odds of fighting the enemy head-on. After pre-season transfers, our server has one of the lowest WvW populations in the league, so we are continuously outnumbered even after concentrating our WvW forces on one map. It took less than a week for most of our WvWers to adapt and most of our PvEers to just give up on WvW, further exacerbating the downward spiral in WvW population. They have not given up on WvW entirely, but they should be able to get the meta-achievement around the halfway point of the season, and our Saturday morning “EB zerg” was already 9 players by the time I logged off. On the plus side, the remaining people we have are getting really good at siege placement while the big teams are getting sloppy.
To strengthen my previous whining, if the goal is to turn WvW into PvE, where small teams are trying to fight undefended towers and large teams are just hoping to find the small teams, pitting the #7 team against the #15 team is a great plan. This is also great for gaining WvW ranks and achievements, because you have a constant stream of mostly undefended towers and camps flipping.
As someone who thinks of himself as primarily a PvE player, this should be an unmitigated win for me, but it presently feels more like one part of the game has just been ruined.
Again, the picture will differ where the weight range is smaller.