It's sad because gnome worked very well for me so far, and I've actually seen Ubuntu becoming the mainstream choice for freelance dev teams at many places over the last couple of years. I do feel guilty to criticize other people's hard work given for free to me without constructive criticism but as far as I'm concerned gnome shoots for a future and audience of desktop users that just isn't there when IMHO the goal should be to preserve what precious free desktop apps we have and not making app development any more difficult or gnome-centric.
Despite its bad reputation in early days, KDE Plasma 5 nowadays is very lightweight. As in, the resource usage is pretty much on par with Xfce.
[1]: https://userbase.kde.org/Plasma/How_to_create_a_Unity-like_l...
https://kde.org/plasma-desktop
It was quite easy to install and everything worked out-of-the-box. I just customized some widgets, the dark theme, icon colors and now it looks amazing. Best Linux desktop I've used so far.