Latest development update on ODK 2.0?

ODK 2 had a release earlier this week. See:

Here is a publication that describes some deployments: https://dl.acm.org/citation.cfm?id=3081365

Currently the ODK project is in the middle of a website upgrade so information is a bit scattered right now, will hopefully be resolved in the coming weeks.

This is the right forum to ask about Aggregate and RedCAP server integration. You can create a feature request and if voted high enough it might be taken up.