I'd say get used to it. After using viewer 1 for 6 years, i was pleased to get a more updated UI, even if its not as simple to use, and did take a bit more work to get comfy with.
LL has made a LOT of changes that have improved useability of V2,V3 already, since it was first released. I think that if more people would have supported it and tried to encourage more positive improvements instead of jumping off onto something mimicking V1, because that was easier, it would have encouraged even more improvements by now.
I wouldn't want to go back to the old viewer or anything that even tried to look like it. That would be like going back to the '50's after living thru the 90's! You might hate cell phones because they are too complicated to use, but would you do without them?