Re: changing the core /groups/ and /forums/ slugs?
@nanchante if you have groups, members, etc., enabled for your BuddyPress installation, then we need to have the slugs there for the permalinks to the component pages. Otherwise, madness will reign 
If you just want to rearrange navigation or to highlight priority in the way the different components are rendered in a) main navigation or b) member pages or c) group pages, then there are other ways to resolve that.
