I had way more fun last night in the MW than in the LW arena, far more players were willing to fight than play hit and run all the time. This may have been down to not having planes like the P-51D and FW190D available or maybe players were less concerned about their scores in MW.
A few weeks ago HTC changed the LW MA to a new server and a new ISP. The other arenas are all still on the old server and ISP. A number of players have mentioned poor connects and micro warps in the LW MA since then. A few days ago Lusche noticed that the host latency graph was very spiky in the LW MA and not the other arenas and Skuzzy suggested this might be an issue with the new server. Possibly the spiky graph and Sunday's crash are related.