I am agree, the current matchmaking system sucks! We have often very imbalanced matchups and this is not interesting for low servers, but even for high servers because of no resistance.
For instance, look at the matchup Elona Reach vs Gandara vs Far Shiverpeaks. This is n°3 vs n°13 vs n°16. Such things should not happen, Elona Reach is no match for them, both servers are going to be repel of WvW!