It may seem a bit nitpicky but it would be such an easy fix and would make the browser look a lot better. and before i tell the issue i already know that you could fix it yourself as a user but the fix would be so simple that it is kinda annoying.
You see the why the DuckDuckGo browser looks really nice because it has the same color on the new tab page and on the address bar area? I would suggest Brave to add the same gradient like in their browser(not DuckDuckGo color but their own color just matching their own browsers address bar area). It would be such an easy fix and would make the browser (in my opinion) just better. Obviously i could just get a tool that takes the hex code of the bar for me open a paint app make a completely bland image with only using the same hex as the bar and then upload it as my own wallpaper to brave, but assuming most people wont do that i think this would be a pretty easy way to improve brave (at least the looks) even if in the smallest way.