even if you wouldn't have problem with Veeam you would run an unsupported constellation. Check the Interop Matrix. http://partnerweb.vmware.com/comp_guide ... erop&2=&1=
vCenter 6.5 U1x is not supported to manage 6.5 U2 host. It can work but you definitely run into issues over time.
Thought so as well, but this is incorrect.
You can manage the ESXi with any VC as long as the major+minor versions are same. So any 6.0 VC can manage any 6.0 host, any 6.5 VC can manage any 6.5 (and some lower) hosts.
From your link you can see that VC 6.5 RTM+ can manage ESXi 6.5u2