The latest hotfix for V12 puts back the "Product" column in the Opportunity list, a feature we had in earlier versions. However this still falls short of requirements for product analysis.
The issue arises when a single Opportunity contains more than one product; only the first one gets shown in the Opportunity list.
Logic suggests there should also be an option to show not an Opportunity List, but a Product List, where you can see every product and quantity currently in the opportunities. So if you had both Product A and Product B in an Opp, this would appear in the Product List on two lines. The common fields, such as Opportunity Name, and Record Manager would be duplicated on each line.
This would make it much easier to analyze how many of Product A did we sell last month, or how does the Margin on Product line A compare with Product Line B, or which sales rep sells the most of Product C.