Pre and Post processing with a Feature Update

Hi Tim_Menzel,

   Yes you can do this today. Please take a look at the custom actions capability where you can enable scripts to be executed in various phases of the servicing upgrade process without requiring a task sequence. This should address any lightweight pre \ post customizations. 

Run custom actions during a feature update | Microsoft Docs

   Also recently at ignite Steve_DiAcetis  demoed how to enable a task sequence like flow but using servicing updates rather than media. That might also help address your scenario. Windows updates and recovery: smooth + seamless = happy IT and happy users - Microsoft Tech Community

Thanks