WDE to WWE

Currently we are using WDE and planning to move to WWE, with my initial analysis, i have below questions,

  1. What is the need of cassandra db here? what we are going to do with cassandra?
  2. Any configuration db version upgrade is needed when moving to WWE?
  3. The current WDE has customization to do remote logout of agents by supervisor and CRM (salesforce) integration. I know salesforce integration can be in done, but how about the remote logout, is that comes inbuilt or again we need to do customize?