I kind of feel bad about my first comment because I know it takes a lot of time to do these modifications, the new interface is a clear improvement from what was there before and UX wise it's not bad at all.

It's just that every time I use KDE, I have this feeling that great work doesn't shine as it should because of padding, alignment and box in a box in a box issues. I know these adjustments are a pain to make and that it's a very ungrateful work but it shows.

So, thank you to the design team I guess and keep up the good work.