I don’t have a real preference, but one more advantage to the plugin route is that if you need something that’s not available, cobbling together a plugin is much simpler than modify most projects directly.

I recently spent a lot of time doing this with Odoo and I was very grateful for the modularity.

By the way, in case you haven’t found it, there is a pretty decent wysiwyg editor plugin for DokuWiki. I use it at work and it’s been pretty simple for my users.