I think that dropping a couple of maps from the rotation and adding a few others may be a good idea. A bit more focus on the DE, a little less on the CS maps. Cal rotation is never a bad idea. However, at that point it can begin to become a very competitive level of gameplay, and sometimes, we just wanna have fun.
The idea of dust2 24-7 can and will get old quickly. However, you could always make it so the server stay on Dust2 until there are enough people in it to have a vote for the next map. Usually, if most of the people vote for the next map, they're going to stay to play it. And then when the server empties, it will go back to Dust2 to attract people.
16k is never a bad idea. People love money. A lot of people feel that it keeps the server fair. I rather a gree with it. Yes, earning the money to buy your guns should truly be earned, but now that the new CAL config for Source gives an automatic 16k and there is no more pistol round, most people want it to be like that in their pubs as well. I agree in it making the game more fair. Everyone can get the gun they prefer using, and so therefore, the competition is on. If you suck with a pistol, you don't have to worry about absolutely dying the first round, every map.
Just some ideas. I am more than willing to help get the population rolling in the Lethal server. I have gotten people into it like three times in the last two days. But, I need some help, too.