So after a rebuild and creating a baseline for Host Extension, all is working.
Has anyone run into an issue installing MEM 1.5 on ESXi 6 using VUM? It seems the ESXi host will no longer boot with a generic "OS not bootable message". It is running on a Dell PER630. Anyone seen this or have a suggestion to get the host to boot before I make the drive to this remote site to investigate?  Thanks. 
MEM 1.5 Issue Updating using VUM