Yes, Westfield has been very exhausting for the server. I would love to see what you make, but I know for a fact that hammer is a very limiting and rage-inducing tool to create maps with. The structure of most RP maps are pretty similar - police department, bank, casino, apartments, streets, and bigger homes. We're very open at this point.
There's plenty of other maps at our disposal, though: Abuseme city, Freemancity, City45, and a few more.
Around Q3 of May for anyone wondering for the next map change. It'll be a surprise.