I spend about 50/50 of my time on the new site and the legacy site. Both experiences are charming to me for different reasons. Currently, across all of my devices, my legacy layout looks broken with no way to fix it. It makes sense that when V2 launches, the legacy view might be retired so as not to use additional resources to maintain it. Has that day come earlier than I expected?
Sad a bit because I wasn't ready to let go yet and will really miss it!
Can you describe how it seems broken to you, or post a screenshot of what you mean? The legacy site hasn't been retired yet as Kumos is not in a ready enough state yet to move everything over, so if you are experiencing viewing issues it may be some sort of bug or an issue with your browser or custom CSS or something we could try to help you with.
[edit]Additional question, are you using the Friend Feed widget on your sidebar? If so, try removing that and see if it fixes. That widget has been known to cause display problems sometimes.