The new TX REST source is great: it is still complex, but easier to deal with than CData by far. There are some additions that would make it easier:
I have a number of APIs to deal with that require flattening as well as dynamically generating the Path to include to- and from-dates. Apart from pulling regular extractions we also want to be able to request historical data and backload it. It would be really handy to be able to clone one of the REST endpoint setups and adjust a few parameters instead of needing to fill out all the fields.
I know I can probably do something complex and create a manual table and a function that queries that to generate the list of to- and from-dates, but that is overkill if you just want to make some endpoints for a full year or similar.