Every ESP I have worked with has some mechanism for tracking how an email click converts on a client website into a sale, such as placing the ESP's pixel on an order confirmation webpage. For example, all retailers need to know how email campaigns drive conversion rate, orders, linked sales, average order value and revenue per email. Unfortunately, ACS does not have this pixel and has no means to include whether or not an email drove a sale in its dynamic reports. One must log into Adobe Analytics and look at "behavioral data" in that tool. This means 1) the email marketer cannot produce all campaign KPIs inside of ACS, 2) the email marketer must either learn a 2nd tool (AA) or ask their AA analyst for help, 3) time must be spent exporting campaign results from both ACS and AA for marketer's internal reports (so extra time consuming).
I recommend Adobe pipe the sales conversion data (and view viewed conversion data if a brand needs that) from AA into ACS dynamic reports, or create an ACS pixel that will track sales orders and send results directly into ACS.