I think the biggest plus of development corner is that it keeps most of the new development material in one big "spoiler". Anyone can read it if they want, but it's very easy to avoid doing so. I have deliberately avoided reading almost anything there.
A group does not necessarily have a color associated with it, so having several groups does not mean having several colors. Being a member of the development group currently does not confer any fancy colored name. So I think they are really two different options. If the lead developers think multiple groups for different types of contributor would be useful, then try it out. If it doesn't work out the groups can easily be dissolved again, and everyone merged into the one developers group. Then, as a separate issue, I would say contributors should get a special color for their name, but just one color for all contributors.
One question I have is regarding who can PM a group. Currently, it's not possible to PM the developers group unless you are a member. I don't see any real downside to that. However, if, for example, I'm a content creator and I want to PM the coders because I need some code changes, then not being able to do so would be inconvenient. So would contributors be able to PM any contributor group, even if they are not a member of it?
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