The first thing that is interesting here is that you're using 5.0.d with Aikau 1.0.8… because that shouldn't even be possible and might be the reason that you're running into problems. The external Aikau libraries are only supported from 5.0.1 and onwards.
Also, are you also aware of the "alfresco/renderers/CommentsList" that has been added in later versions of Aikau? This might actually solve the problems you're trying to resolve.
Finally, I can't see the link between the screenshot you've posted and the Aikau model provided… what is it that is actually generating that dialog?