Exactly (at least in my experience). I have my gaming apps pinned in my gaming activity, and my work apps in my work activities. The only annoyance there is when certain apps open in the "wrong" activity. For instance, I pretty much always have the Kate text editor up in my gaming activity because I play games with a million mods and constantly have to fix things. Because of that, when I need Kate for work it'll tend to open an instance in the gaming activity and I have to move it in the clunky way stuff gets moved between activities.