I found CMS Made Simple to be very easy to template, for instance. And I used ModX for years before using WP, and it is also very easy to template, and offers a lot of nice features. They will appeal to someone who wants to develop, but is generally uncomfortable in PHP. You can mostly get by with HTML and template tags. This tends to prevent the “white screen of death”.
To have an effective eCommerce sales funnel, you must first know what a funnel is even is and how to build one. Lead generation and sales funnels come in many different shapes and sizes. And they work extremely well because they often start off with a very simple task, such as a click or an email submit, and then walk the user through a process where they complete more steps (like an eventual sale) over time.