i think when 2lewd is released (sooner than expected owo), i will be purging any inactive groups and eventually coming up with an idea of how to make them work better.
one thing i'm kinda toying with is just letting everyone change their colour to whatever they want and then only keeping groups that actually have discussion in them.
at launch the groups functionality will be kinda meh, you'll be able to post/view threads in the groups you're already in but won't be able to make or join any groups.