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to change the presented consider template inheritance.  this allows a dev to add/change/delete template content.  I did not read everything above 

http://build.prestashop.com/news/starter-theme-news/#template-inheritance

more about: Parent/Child Theme Feature In PrestaShop 1.7

http://build.prestashop.com/news/Child-Themes-Feature/

with template inheritance anything can be modified without jumping through a bunch of hoops

to change the presented content then use template inheritance.  this allows a dev to add/change/delete template content.  I did not read everything above 

http://build.prestashop.com/news/starter-theme-news/#template-inheritance

more about: Parent/Child Theme Feature In PrestaShop 1.7

http://build.prestashop.com/news/Child-Themes-Feature/

with template inheritance anything can be modified without jumping through a bunch of hoops