+ 1 for dropping mesos. Most of the PMCs have already left the project [1] and a move to attic was barely avoided. Overall kubernetes has taken its place and it is unlikely that we will see a surge in Mesos very soon.
Best, Fabian [1] https://lists.apache.org/thread.html/rab2a820507f7c846e54a847398ab20f47698ec5bce0c8e182bfe51ba%40%3Cdev.mesos.apache.org%3E