The table calculation is really powerful and convenient. Calculated Field and Parameters are also very useful. This is much better than Google Dashboard. With these features, SQL queries can be simplified and let Tableau do the rest of the job.
Once the tab name is changed and uploaded to the server, the previous link will break. Compared to excel, it lacks the flexibility to make pretty front. When I search for specific functionality usages, the tableau community or help page sometimes show very old pages and those pages never get updated.
When putting multiple sheets in dashboard, the shape or the length of the container won't adjust according to the the length of the data rows returned.
When switch data source in one sheet, all other sheets that use same data source will also be changed.
The integration with R is not that powerful. A lot of useful visualization or analysis functions in R are not support in Tableau.
The subscription feature can be improved so that users will not get report if anomaly is detected in the data.
The integration with presto is not good. It works fine in desktop but when the report is uploaded to server there will sometimes be an error message and users can't open the report on server.