I have to agree with so many others: this is a lot closer to what Viewer 2 should have been at its release. I am sorry that it was pushed through, really, before its time. The tear offs in the sidebar is a huge improvement over 2.0 and 2.1.
I'd still love to see at least the option of a lighter UI for those who really don't do well with light text on dark background.
I'd also love to see greater enhancements and flexibility with groups/friends/profiles/inventory.
Nevertheless, kudos for a big, big step in the right direction. I would *hope* that those who are adamantly opposed to Viewer 2 at least give this a reasonable try, and test it out for a week or so. If you still don't like it, or if there's some clear deal breakers for you -- by all means, file JIRAs and head for the third party viewers. But... try it.