column separator stop to work

Yes, but you can disable that. In fact, I recommend you disable all automatic data loading in Excel. I have my Excel Power Query options set as follows:

Then, if you right-click on the query once you are actually in Excel and select the Load To menu option, you get this dialog box. Make sure Connection Only, and Load to Data Model are selected. Then only the data model will have the data, just as if you'd imported through Power Pivot. But now that is in Power Query, you can do all sorts of transformations before it loads. Filter, grouping, column renaming, adding new columns, removing columns, etc.