This was one of the most important lessons I learned at my first job out of university. Beautiful, well structured, clear, simple code is nice, but the customer doesn't give a shit about it. All the customer cares about is that your product solves their problem.

By all means, if you have additional resources, invest them in refactoring and improvements and additional testing and continuous integration and all those things that make our days enjoyable and our product quality high. But your first priority has to be making sure that your product solves your customer's problem.