The new integration mechanism is generally good. However, the Integration Update window is now a mess. There are many Features and Requirements that have appropriate links and should simply auto-import. Instead they sit in the list making the list worse than a simple query. Please provide more mechanisms to manage the incoming flow.
I understand the theory that Product should be aware of all changes so forcing them to choose what to integrate makes sense. However, there are often Features that are of a more technical nature and Engineering creates Requirements in their tool that Product doesn't necessary need to know about. I recommend a setting on the Feature along the lines of "Allow Requirement Integrations to happen automatically" would be beneficial.
I would say make it optional by product