When I first started they had just reset the terrain and the game hardly lagged, but since then has gotten progressively worse and worse. Right now we hit huge patches of lag I guess while the server is 'baking' in the new terrain changes and the game is unplayable for up to 15 minutes at a time. Pretty much useless half the time to play now since the server is so lagged.
If you want an idea of what I am talking about start a new char in Round Tree and look at the 400 ft wall which goes miles and miles around and ecompasses a giant new lake it formed.
You can reset the terrain and it will leave objects to fix this lag like you did before and hopefully these guys will relax on the over-teraforming they have been doing.
Hate to be a buzz-kill for them, but the game is hardly playable from their actions.