I'm honestly not sure what you're talking about here - the roomlist is pure SwiftUI, and looks almost identical to iMessage or WhatsApp to me. What is the "glaring spacing/padding issues" you're talking about? Similarly on the timeline views...
Can you link to a bug on github.com/element-hq/element-x-ios/issues please?
Can you link to a bug on github.com/element-hq/element-x-ios/issues please?