Do you miss something on BrainKing.com and would you like to see it here? Post your request into this board! If there is a more specific board for the request, (i.e. game rule changes etc) then it should be posted and discussed on that specific board.
pawns are not the only problem, and possibly not the biggest. they are the only ones not contributing to the solution however. Having said that, if I was still a pawn I probably wouldn't join until the site performance increased.
Attrition of paying members is likely to be a problem for the future of the site I would imagine, so anything that improves performance and availability should be tried.
Here's another thought: turn off the auto refresh, or limit the lower number to 5 minutes. I suspect the number of people who leave the browser up while not actively playing is causing some unnecessary performance problems.