I really wannt suggest Adobe to allow 3rd parties access the RAW data.
The GUI and the Workflow of ACR along its tools imported from Photoshop makes it a great and easy tool for developing RAW files.
It does have 2 major disadvantages:
What I suggest is that Adobe will add an API will let other companies to address those issues by accessing the RAW data.
I would really would like to see NR reduction Plug-In's such as Noiseware, Topaz Denoise, Neat Image and Noise Ninja accessing the RAW data and improving siginifantly the NR results.