The actionbar.... I really dunno how to say this other than it looks really odd there. It's not something you want to see surely? When mounts etc can be binded and hidden.
The time on chat is something I personally have no need to see. But if it's something YOU need (part of the whole point of being minimalistic without going over the top) then fair enough.
When I first saw your UI I actually thought the threat bars were the party frames due to it being class colored and standing out alot more than the others. When I'm healing I've rarely seen issues with threat but even when there is, something like Grid comes with threat for frames anyway.