Users want and use sites that solve our problems, nothing more. Not a complex system that has a lot of functionality that can be useful, but very complex to explain in a few sentences. In the end, we must make a site user manual, which obviously nobody reads and therefore no end user or to understand neither our project, nor the hell do.
That was one of many mistakes I made. Add functionality is fine, but best done in stages. First it lets you focus on what you really need to solve a problem or do something better than anyone, even if only one thing. Second because it took so long to be in the market (TTM) and this can be a competitive advantage, because surely what you do, you will be doing and to someone else in the world.
What to do to fix it?
Those who are anxious tend to think thousands of features, not all have to be harmful, so I think it’s best to list all the features you’d like to see in Excel, and let time pass. Later re-look at the Excel functions and which of them will look still seem interesting. I am convinced that many of them will seem useless or uninteresting after a while. Those who still look interesting, program alas for later phases.
Still usually a better idea to ask your users. There are tools for it as Survey Monkey, Get Satisfaction, and User Voice. You can also Click Tale usability testing, Silverback User Testing or App or seek feedback from your designs.