This could be similar to the old FB feature. Could also be another instance of the 好き feedback.
Would be nice for people to have some way to get feedback that others are / have viewed their profile or garden, and get some positive feedback from others in the community.
There is no indication that anyone sees the things you work on (profile, stats, garden), so this could make it them feel more 'alive', and possibly even spark people to start chatting.
Sorry, I'm not planning on adding this - I do not want to "social media"-fy renshuu beyond recognition for Japanese content (sentences) and information (forums, usage notes, etc.)