[yoyonamite]

I think there are ways to do this correctly but it has to be more static pages with JS enhancement and/or making certain sections standalone "single page apps". It sounds like you're halfway in-between and that leads to the sorts of issues you're talking about. Being halfway in-between does mean that you're also halfway to an SPA, so maybe just commit fully to that direction?

Personally, I find webpacker to be straightforward and not that magical relative to the asset pipeline.