Disadvantages of enabling Google+ comments on Blogger‏

The Google Plus comments integration with Blogger is turning to be interesting part of blogging since it is launched, and a lot of bloggers have gone ahead and implemented it on their blogger. This seems to be one of the biggest improvements in Blogger over the recent past. And at first glance, it looks pretty slick, with a clean and solid implementation. It makes things really easy, especially for bloggers who can track the conversation more easily. At the same time, readers can contribute right from Google Plus, without needing to open the blog. However, upon closer inspection, it seems that the new implementation isn't without its flaws.
There are many disadvantages in this new commenting system, some main disadvantages of using this new commenting system are.
 

Disadvantages of using Google+ comments on blogger

• To use this feature, users needs to use their Google account ID, which can be a bit of a problem for readers who are using alternatives. But the real problem lies in the fact that this commenting system is dependent upon the URL of your blog. If you change the URL, for example when you are migrating to another domain or re-branding, you will not be able to migrate these comments, and they will be deleted! Unlike Facebook Comment API, Google comments aren't stored on any app accounts. This means that migration is not an option, and that, you'll lost all your comments should any such thing happen.
• Another big disadvantage is the increase in Page Load Speed. It takes some time before all the data is fetched from Google. Usually, this isn't noticeable, but try loading your blog on a slow dial-up connection, and you will see those comments appear much later.
  Some people have also reported that the comment statistics are no longer accurate (or sometimes visible).

This is the screenshot of New Google+’s commenting system on Blogger.