Here's some current updates:
The Manual of Style's article content header has been updated for more clarity, with suggestions from EvieMaybe on sentence case and singular title. I've already added item names for clarity as well, and mentioned omitting grammatical contractions.
Moving character pages from full names to first names has concluded. As of April 14, all characters except Rouxls Kaard now have their first/commonly used names as their main URL. As an example, Deltarune's Dess and Undertale's Asriel are now at:
https://deltarune.wiki/w/Dess
https://undertale.wiki/w/Asriel
Big thanks to @WitheredFreddy1993 for helping with the mass standardizing!
He, F-sharp, and some other editors have been working on New Pages Project: NPC pages, which is getting close to done! It's only Hometown/NPCs and Undertale Wiki moves at this point, and I'd recommend anyone else try to help wrap this up and earn the Malius badges!