Some thoughts from my side:
- I believe that dividing over 3000 topics into just 2 categories is a lot of work, and I wonder who will have the time to take on this task.
- Furthermore, I do not believe that all topics in UX can be easily divided into Feature and Bug. For me, a report about a text that cannot be translated is not really a bug report[1]. Likewise, pointing out an incomprehensible or outdated text is neither a feature request nor a bug report[2]. Similarly, descriptions of user experiences that contain neither an error nor a concrete improvement suggestion do not fit into Feature or Bug[3].
- I do not know how you have handled this so far, but I had the impression that developers, when necessary, also worked on UX topics, and vice versa. I wonder whether it might be possible to keep things as they were, with the group monitoring the category simply informing the other group if needed, without moving the post. However, I cannot fully evaluate this, as I do not know the processes before or now.