To be honest, I think that the 25x25 plots are actually fairly nice if you stick to a single profession. Of course, people will inevitably want to do different things, but nothing's stopping them from changing their profession to something different for a while, either.
The economy's still trying to take off (although coinage seems to circulate quite well at the moment), but we are still expecting more citizens to move in. Hell, I have a feeling that thousands of additional coins are about to start circulating any day now. I think we're about to go through a minor bottleneck before the economy goes in full swing.