[cflsystems]

XC5 will never be as easy to modify as XC4. It is the nature of the code, structure and how everything works together.
While in XC4 non-technical person can do small modification or just follow some code changes guide from the forum this is not the case with XC5. XC5, MVC and OOP for the matter, is not user-friendly software for non-developers. And the fact that stock code cannot be and should not be modified due to the way upgrades work forces every change even a small one to be done via custom module.
So XC5 users will either have to become developers themselves or rely on paid services from QT or 3rd party devs.
Since XC5 is way more complicated as code and organization and way of work the "copy/paste this here that there" doesn't work. Every change has to be done following certain code standards and structure.

I think XC users who wants to be able to do small changes to cart themselves should stick to XC4. It is more proven to work and easier to change/debug.