We have Nested Repeat regions and update relational table server behaviors in DataAssist. They may be comperable.
We have had several requests for an MX Includes replacement, and we don't offer anything directly comperable. I still don't fully grasp what it really does for you having never used the MX includes product, but thank you for your description it is a little clearer. I'll try to find time to do more research to see if this would be something we could add to our tools. Thanks for the suggestions.