Easy Way to Manage Process Creation Rights

Hi Promappers

I am looking for a good way to limit process creation in our repository. 

What I want to do is have default users as read only, then have selected users with the ability to create processes. I don't want to grant BA or PM privileges to these users only the ability to create processes.

I know I can switch the the setting so that only PM, BA and PC can create processes, but this then leaves me with having to add each user separately to each Process Group as a Process Champion when they need to have process creation rights to. 

Ideally I would like to do this via role allocation. Realistically I feel this should have been added as a privilege type so it can be managed at the user level but obviously we are limited to the 3 privileges that the developers have given us.

Has anyone come up with a simple solution for this?

Cheers