Changes to #collaboration probably aren’t going to happen considering it’s about to be deleted:
Instead of requesting features for a deprecated category it would be worth focusing on providing Talent Hub feedback since this is Roblox’s long-term solution for collaboration. Making changes like this to the forum category (and further encouraging its use) makes no sense considering their plans for the Talent Hub.
Unfortunately, this is a limitation with Discourse - when we stop people posting new threads, it also stops people editing their thread names. Feel free to PM me and I can update it to whatever you reasonably want in the meantime.