Corporate Mutt: JCAPs - Domain vs. Logicalhost

With 5.1.x come domains as a replacement for logicalhosts (5.0.5). Here was my initial confusion, the documentation states that a domain is an instance of a logicalhost, but is it really? A domain is made up of an integration server and a JMS manager. Is this equivalent to a logicalhost? In my opinion, not really.

I see disadvantages to domains, especially in situations where a process spans multiple IS's and IQ managers. As most of our processes do not span as such, I feel that we can get around this. Another disadvantage is deploying from the Enterprise Designer because the system structure is not representative of the physical structure of the application servers and JMS managers. On the flip side,

I see an advantage with deployments through the Enterprise Manager via build files. This allows for multiple deployments to multiple domains at the same time with being selective of what is enabled and what is not. This will help out with failover.