Events categories and events dates in the permalink structure
For a better SEO friendly URL structure I suggest the customization of the permalink structure including the category for the single event and maybe the date of th event too.
Interesting idea. This would probably be added as an option for permalinks, since not everyone would want it.
For the seo in 2018/2019 (with so far late too late...), yes sure, you really must consider it i think!
The CATEGORY permalink is the "primordial" way for the WordPress SEO optimization text for GOOGLE today!