Great ideas! I really like the library(LeoGlossary) item and the tags proposal. Since I started on Hive with PeakD I had also a hard time finding that tag button. And even still it kinda feels like it's not in the right place!

I think that it would be cleaner to group the threads that are connected to each other. This way, the viewer knows what replies belong to which thread/reply.

Two thumbs up also for this suggestion.