Hi Cubi,
We are totally aware that Groove Agent 4 means a big change for customers of the previous versions. But let me assure you that it is totally worth it. There are so many new features in Groove Agent 4 that have to be learned, but also offer so many new opportunities for drum production.
Have you seen the pattern overview page already? On this page you can see which patterns are currently playing and you can activate/de-activate all the patterns of all Agents.