• make it possible to select a subset of fields from a Salesforce object

Primarily, this would make it possible to work with SF objects that have exceeded the limit of 256 or whatever it is for Access. There would be other benefits too. But this alone would make the Salesforce/Access integration much more doable (right now I have to use an intermediary such as power query or sql server for these larger objects)

• make it possible to link to Salesforce reports. (less important but very helpful)

1 is really very necessary. I'd go so far as to say that without that the feature is only half baked, and not particularly useful.