This tool only receives TS feed (TS sends out data to excel), so not much used by traders. what majority Tradestation users need is, to receive or retrieve data from excel to play any market that TS don't support
I was more pointing out that there is a fast interface for Excel. Data providers could all provide a similar interface, maybe some do already. I'm seeing Excel as a node of integration between different data providers and different software vendors and IB.