This is a bit like the Great Blog Debate that smouldered for years. The problem is often that the developer sees the module being used one way while other users would like to use it another. Michael Dougiamas used to insist that blogs in Moodle should on no account allow comments, because blogging would distract students from activities and there were other modules, such as forums, which kept blog-style interaction in the learning context. That may have been true for many installations, but for many others, Moodle blogs would have held benefits. Now I see comments can be enabled if desired. From the user end, that's a simple solution to the problem of whether blogging should be allowed or not.
I suggest the question of whether definitions display in pop-ups or tooltips is a similar issue. When the developers have time to put in the code, users should have the option of displaying definitions in pop-ups or tooltips.