Hi,
1) We didn’t add them below the avatar, but in each profile page. We don’t add them below the avatar to avoid slowing down too much pages with many reviews. Adding these info would mean adding a lot more db queries for each new comment.
2) WPML doesn’t allow that. The problem isn’t how GD integrate with it.
3) WordPress doesn’t natively provide a comment title. This could be a good feature request, but you are the 1st to request such thing, your opinion for us is important, but we only cahnge/add things when they are requested by a large number of users. Not only 1.
You could always have similar things added for you by any developer. But that would be part of your project, like adding locations, categories and listings.
Thanks