KDE toolbar content dependent on activities

So the developers excluded toolbars from activities and they are uniform among all activities. A lot was written about how they practically killed the idea of activities. *But is there any **workaround** what so ever?* Like to make a different content of the tool bar for each activity or some grouping widgets (Quick Launcher, Folder View, etc.), which would be able to have different content for each activity? BTW, for someone who knows KDE API and ways, it should be a job for a half an hour max, to adjust Quick Launcher and Folder View to have it's content Activity-dependent. Unfortunately, I only develop in .NET...