I never use the Glossary myself, which means it is not a basic feature to me
Everyone has other ideas about what is basic and not. I love to use the TOC to allow navigation, but I don't see why I would need a Glossary in each course module? Although I am very focussed on correct terminology, as you would see in my blog, I don't find it necessary to have that reference in each course module, would offer it in a pdf format that can be reached from within any couse module, instead of having such an interaction in each module.
If you want it anyway, it can perfectly be created as a custom Glossary, which you can design to be reached from any slide. This blog post is not about a glossary, but about going to Help slides from any slide, and getting back. Maybe it could give you some ideas.
Navigation Help Slides - Captivate blog