As always with design/UI/UX choices, it seems that opinions are divided. There are others who are apparently thrilled: A word of thanks. 
I haven’t used the new version yet; The Arch Linux packakge is still on 4.0.8, and that’s probably for the best, considering how many open issue there still are on GitHub, including, apparently, a memory leak: https://github.com/nextcloud/desktop/issues
Speaking of GitHub issues: If you have suggestions that you would like to bring directly to the attention of the developers, it is best to open an issue there. Here, we can only agree or disagree with your suggestions, but ultimately, it is the developers who decide on any changes, and they track issues on GitHub.