As you are aware, the MCUs have been on the way out for a while - originally being replaced by TelePresence Server (TPS), and now Cisco Meeting Server (CMS). There's a list of differences between MCU and TPS and some of this is similar with CMS, apart from CMS can now do the web conferencing that TPS couldn't which narrows the gap of "missing" features even further, but does include many additonal benefits such as the interop with multiple other brands, the redunduncy and scalability mentioned by patrmcca, there is also better branding support (where you can customise the screens for your company) and CMS can also provide recording capabilities with the CMS-RECORDING option.
In a new install, unless you specifically need an Auto Attendant, or one of the specific MCU only layouts (which may also become less important over time as the endpoints become more capable with multi-streaming), then the answer should pretty well always be CMS.
Wayne
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Wayne
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