Not always, but it often is. Zoomed to 200% the new design is fine though. Content fills the entire screen and the floating table of contents disappears. Works for me at least.
And now the text is huge. Sounds like you either are sitting too far away from your monitor, or need to have your eyes tested if that actually feels comfortable.
I don't know if there's a "correct" distance, but I do have the monitor set fairly far back. Text is still perfectly readable at 100% it just doesn't fill the screen.