No disadvantage. All the WebEx Node for MCS did was provide a rendezvous point for WebEx clients that were inside the firewall to terminate their session to. This lowered the bandwidth requirement toward the WebEx SaaS cloud. For example: if you had 10 users in a meeting, all behind the firewall, you would have 10 streams to the local node and one from the node to the WebEx cloud instead of all 10 clients connecting to the cloud directly.
In the MeetingPlace 8.5 design you were required to hold a WebEx MeetingCenter contract. The local MeetingPlace server was only an audio/video bridge. It was not a standalone solution. The recently announced WebEx Meetings Server is an entirely standalone product which does not require a WebEx contract.
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