No solution for persistent/statefull applications, which is a real disapointment, seeing as this is where I see orchestration systems currently breaking new ground and coming up with interesting solutions. The contraint systems also doesn't look too impressive; can I do the equiq of Marathon's GROUP_BY contraint (i.e. AZ GROUP_BY 2 -> ensure I have instances running on >=2 machines w/ different AZ values)?

Also no maintenance primitives, but that's just me being in love with Mesos.