I vote a lot on Unix & Linux. I often run into the measly limit of 40 votes per day.
In order to ration my votes and not overly favor questions posted early morning, I frequently check how many votes I have left. This was easy with the old top bar design. Now, I need to visit my profile and scroll down to the bottom, or switch to another tab where I have my profile open and reload the page.
I know that most users aren't affected as much, because hitting the vote limit isn't very common over the whole user base. But for me on this site, this is a major regression. Unsurprisingly other heavy voters have the same problem.
A few months later… my voting habits have changed a lot, and this is the cause. I now rarely ever run into the 40 vote limit, as long as I check the site roughly every 24 hours. That's because I have lowered my voting threshold a lot. You now need to post a pretty good question or answer to get an upvote from me. I've also started to vote or not-vote based on the existing score — if your post already has a handful of votes, I now tend to abstain. I think this is a bad consequence of this UI change — and I've yet to see a compensating benefit.