From the proposal for the hard fork release 0.17
Comments have a very different level of visibility and therefore get considerably fewer votes. In the past month only 1% of rewards were paid to commenters. Due to the nature of the N^2 reward curve it means comments are not competing against other comments, but against the top bloggers.
We feel that engaging more people in discussion and encouraging higher quality comments will make the platform more desirable. While relatively few people want to blog, many more are interested in commenting.
If all comments only have to compete against other comments, then more users can participate and comments can collectively garner a larger percentage of the reward pool. We are proposing that comments be allocated 38% (golden ratio) of the current reward pool and that comments be rewarded on a N log (N) curve with some to-be-determined modifications. This should work to allocate more rewards to those who contribute to discussions and drive community engagement.
Personally I think this is great news, I have made a few posts about my concerns that there is not enough secondary interaction (i.e comments) and I think this will go a long way to resolving that.
It may also be harder for the bots as well. As for the most part to get a comment upvoted you will have to read the post, should be obvious if you haven't. We have all got those comments saying something generic like "great post so beautiful" and it was a poo joke.
Other advantages could be an askscience community like on reddit, where the comments are the best bit.
Anyway looking forward to seeing what others feel about this potential change.