BrownenM, good questions. Sorry for the delay in responding.

To start, remember the name of the office: Coordinator for Reconstruction and Stabilization. The "C" is important. USAID isn't not shoved the side, but in fact does bring its years of experience to the table. But also bear in mind, as I understand you have some experience in this area, that USAID's mandate is not post-conflict (or nearly post-conflict) zones, but humanitarian aid. The mission of CRS excludes humanitarian missions.

Also bear in mind the ARC, as well as the SRC, as not CRS staffers, but other members of other agencies tasked to this role, including USAID. From the post:
The ARC would be composed of dedicated civil servants from across USG, mostly from the State Department, USAID, but also from the Justice Department, the Agricultural Department, and others.
There's a reason the top leadership of USAID is completely on board with this. (As well as USDA, Commerce, DoD...) It is likely USAID will be found doing the bulk of the heavy lifting (literally). Also, there are two deputy coordinators at CRS, one of which is detailed from USAID.

Does CRS bring money? To some extent, but again keep in mind the "C". The easiest funding is with 1207 money, or USAID, or supplementals, or ?? depending on the situation and the requirements.

Maybe thinking of CRS as a hub to channel skills from the various spokes of government would be a useful visual.

As far as OHRA or CPA being State ventures. Not quite... In fact, these are perfect examples of why a) State should do this and b) why a standing office needs to exist.

Regarding SRC, it is more like the ARC than the CRC in that it draws from existing USG personnel. The major difference between ARC and SRC is the slower call-up.

As far as the CRC, there would be an orientation training but at the start of the 'enlistment', but consider that the Peace Corps is not just preparing a person for the local culture but training them in the job they'll perform. For the CRC, these are already knowledgable professionals. Because of the nature of the deployments -- they don't know where they'll be deployed until called up by the President -- their orientation would focus on integration with military and other functional details. After they are called up they are given the mission specific training.

I hope that helps.

Matt