if CloudCatalyst is not moving fast enough I would check the logs to see if you have connections issues. If you CC is retrying pieces over and over you should modify the number of concurrent connections. MSDP-C could have the same issue. On the other...
Appliance SNMP will only work for the hardware/OS monitoring. It won't work for NBU, but you can always add OpsCenter and send SNMP traps for other NBU related things.
From what you wrote I understood you plan to use both 5250 in one or two locations and a 3rd location would hold the secondary copies for both 5250 backups. So in short, yes. That would work. just remember that you need enough resources on that virtu...
If you are running 8.3.0.1 up to MR1 this could be resource related and not space related. If things get back to normal after a reboot I would recommend to get the latest MR for 8.3.0.1 or go higher...