Looker doesn't connect to Excel, which is a huge disappointment because a lot of data is presented in Excel. Also, it can't consume data directly from REST APIs, which is necessary. Looker needs to expand its horizons when it comes to data sources. The inability to connect to different data sources is hampering our use cases. Currently, it only has an ODBC connection that connects to a database. It needs to connect to other data sources, such as Excel, APIs and different platforms. You can't create very attractive visuals with the built-in features, but I think they're providing some extensions to develop different visualizations. Looker can't create multiple sheets. You can only create one dashboard. It's not that you're able to toggle through different sheets to navigate different visuals. It's just one and people have to scroll through the dashboard. So scrolling is not something that people generally like to do, rather than segregating them in multiple tabs of sheets.
