Based on the graph in the OP of said forum, and conversation on IRC.
The current system of increasing WMD ratings as the level increases *and* increasing base damage as the level increases results in a rather problematic progression system.
This may be one of the reasons why internal compartments pose such a great problem. By making the trend more linear (or at least matching the general curves of the game better) by removing the level from consideration when deciding on the WMD rating of a weapon, this may make compartments (and early-game multihulled stations) less problematic to players. However, this would likely cause issues with wreck HP, and potentially overcorrect the issue and make compartments underpowered.
Edit: 2/1/2016, altered title a bit, rephrased main paragraph.