Loving the Simple Fields plugin but find a few limitations the more I use it and the main one is to do with adding field groups to connectors.
Currently it seems that you can only add one instance of the a field group to a connector. It would be great if you could add the same field group multiple times but give each instance a unique name in the connector (which will then show up in the post/page editor). Otherwise you have to create multiple field groups which all have the same fields.
Obviously there is the option to use repeatable but this has has its own issues as each instance in the repeater is referenced by an idea and if you add new ones of change other order everything can get screwed up.
Anyway, look forward to seeing what additional features will get in Simple Fields in the future.