Adding description to the title text has been planned for a very long time -- we've been discussing how to handle title text vs alt text for about two years now -- so the question was never "display name or description", it's always been "display name in addition to description". (Hence rejecting the suggestion, because username + display name + description (+ comment) could conceivably be hundreds of characters long, and in most non-RP use cases, people's display name is something that has no relation to the actual journal and it doesn't make any sense to have it as part of the alt or title.)

However! Having the icon's description in the title text (in addition to the alt text) actually does cover about 99% of the reasons people want to have the display name in the title text. The reasons people have been asking for it (or at least, the reasons that have been cited when people have asked about it) is because they want to be able to easily identify who a particular character is when hovering over the icon, and that can be done by judicious composition of the icon description -- if you write the descriptions for your icons to have the character name in it, that not only gets the character name into the tooltip, it helps to tell screenreader users who the icon is of.

Meanwhile, after pushing the code live and seeing examples of different ways people manage their icons, I decided that the comments field doesn't belong in there after all. I opened a bug for it and it'll change next code push.