Hashtags: to allow users follow trending topics
Emojis: since each post need not be only like (displays wider array of human emotions)
Like & Dislike: although double edge sword, it can filter out good posts in generic sense
Tip: it will encourage and boost users to indirectly make relevant posts
Groups: Can aggregate like minded users
I do believe some features are actively being developed by team
Fore more info, read THORCHAIN
For more info, read THORCHAIN works