Lufthansa to revise “new” livery after only three weeks according to the news on aviation websites.
I think that this rebranding is not a successful one. I read and watched everything on LH's dedicated site for this rebrand; Explore the New. Have a look >>>
Still not convinced!
Removing the famous LH Yellow from the logo (and tail), and decrease its use to as low as %10 (just a small yellow area next to the front door) was not the best decision. Dark blue color and its shape on livery was another problem, which LH is tackling now.

There are good examples, though. Etihad did a fantastic job several years ago. This one was more complicated as two languages were involved, and local cultural sensitivities were higher.
Let's give LH some time and space. I believe that they will consider all feedback and may tweak it again for a better solution.