Ability to import compressed plain text files (i.e in a Zip file)
Ability to import plain text files that are contained within a standard Zip file. This will reduce the amount of time required to transmit the files to PowerBI / PowerQuery / PowerBI Online.
You can achieve this with a function - see my blog for details:
Greg Baldini commented
The compression in a Power BI Data Model is excellent, as is compression on text-based flat files. It's terribly inconvenient to unpack a csv, for example, only to import the data into another compression format. Adding native decompression would be great to import already compressed data without needing 10x the disk space.
Mike Honey commented
This seems fairly easy - just an extension of the existing From Folder functionality. That way it would work with all file formats (Excel, JSON etc).