RedBag's Rorikstead - Enhanced is a nice addition to RedBag's Rorikstead that I enjoy very much. It does however have one tiny issue in that there are objects, specially a totem and a crate, that intersect with the navmesh. This causes NPCs to path into the objects and just kind of run into them awkwardly. I moved the triangles around in the CK in an attempt to fix the navmesh. Both plugins are .ESL flagged .ESPs so they won't take up a place in your load order.
Thanks to RedBag for the original mod and Gonzeh84 for the add-on.
DarkFox127 for explaining navcutting even if I entirely screwed it up
robertgk2017 for explaining how to actually do basic navmesh conflict patching.
Bethesda for the Creation Kit and Skyrim
ElminsterAU for SSEEdit
All of these mod authors do excellent work and you should check all their stuff out.
Instructions
Add the esp to your data folder or drag the zip into your mod manager
Requirements
RedBag's Rorikstead - Enhanced Tiny Fix Patch
RedBag's Rorikstead - Enhanced Tiny Fix Patch