Had a couple of thoughts as I was working with the connector.
It would be nice for debugging large forms if you could disable a step in the connector configuration without deleting it. I've had a couple of situations where I get a vague error returned from SFDC or a reference to a generic field name and I end up deleting and connection and rebuilding in order to test. A frustrating and inefficient technique but one I've found necessary at times.
Also, if the user cold rename steps it would be a huge help for me. One use case I'm facing is that on one form I collect 3 types of contact records. On the connector side all three records look identical and the only way to tell them apart is to click "change" and scroll the list of fields to determine which field is getting set at which point. That action introduces a chance to screw-up the form.
Similarly, and something that could solve the issue above would be the listing of a "full path" to the field instead of just the field name.By "full path" I mean a field named "First Name" inside a section called "Primary Contact" would display as "Primary Contact > First Name" within the connector list.
Otherwise, the v2.0 Connector is pretty great and I'm amazed at what I've been able to do with it so far. Just keep getting lost and having to double back.