I am looking for feedback on Expense Reporting Solutions

I am the CEO of a startup software company and we are building a solution to immeasurably improve the existing expense reporting processes. We feel the present solutions may have missed the mark when it comes to the "centralized services" market and there is a significant marketplace need for a solution built to maximize expense reporting through centralized operations. CPA’s, Administrative Assistants, and accounting teams, not to mention out-sourced accounting teams, all leverage the advantages gained by centralizing repetitive accounting and operations functions. We have re-envision the work and process flows and are building new user tools so that centralized services teams will be provided solutions to help them maximize efficiencies, thus substantially lowering operating costs. We also believe our solutions improve overall data input and review quality improving company policy compliance and cost controls. I would love to hear thoughts form this group on features you would like to see but are missing in existing solutions, and also hear about the best features that current provider already offer. thanks for your consideration and thoughts.