The latest update on Miiverse, for all versions, has an extended waiting period in place for those commenting on the same post.
In today's update, those who post a comment on someone else's post will have to wait "around 3 minutes" before commenting again on the same post. However, players are free to comment on their own posts as much as possible.
The web/browser version also received some tweaks today, which include the "Posts from Verified Users" filter at the top of the "Communities" screen, plus a search that allows users to easily bring up communities based on keywords.
What are your thoughts on the changes for Miiverse post restrictions?