VMware plugin over WAN

Is anyone having any success with using a VMware integration which connects
over a WAN? I'm currently running two separate Foreman instances, one in
each datacenter, and now we're trying to consolidate down to one which
connects to both. However the VMware integration over the WAN is really
slow and any VM related page takes close to five minutes to load. I've seen
some mentions in other posts that the plugin is really slow, so I'm just
curious what other people are doing to manage remote VCenter servers over a