Charmander concept is beyond awesome, and the author of United Gnome theme does fantastic work, perhaps he should be contacted, he would probably love to contribute to the new Ubuntu theme. Theme I consider perfectly balanced is Arc Darker theme, Arc is too bright, Arc Dark is too dark which is why Arc Darker strikes a perfect balance and is both aesthetically pleasing and easy to look at. United Gnome has an excellent shell theme, but GTK themes are good, but lack the subtlety of the Arc Darker theme, but United Darker with more Ubuntu colored titlebars, not that black one, would look beautiful with a sprinkle of Charmander concept. Having a fully dark option would be good too as some users like fully dark themes.
Suru icons on Ubuntu Touch looked great and I believe Canonical should reuse a lot of them for the new theme. As for existing icon sets Numix Circle is beautiful, clean and very readable even by a casual glance. I dont like Papirus and similar icons, they lack the professional clean and easily readable look Numix icons have. Apple has great icons everywhere and that is something Ubuntu should strive for, professional looking, cleanly designed and easily readable icons. Most Linux icon packs are either too cluttered with design (too much stuffed on a single icon) so they are not easily readable by a casual glance, also often they choose colors poorly. Numix however does not suffer from these things for the most part and in my opinion is the best Linux icon theme overall, looks nice and professional and has high readability.
Users should not strain their eyes when they look at theme elements, colors and icons and should not spend any excess time “deciphering” icons they are looking at, they should be easily recognizable by a casual glance and easily remembered for their clean design which is why I personally consider United Gnome shell theme, Arc Darker GTK theme and Numix Circle icons the most professional and clean looking Linux theming I found. These plus Suru icons and Charmander concept would make for a fantastic new Ubuntu theme. Ubuntu should have a unique look and feel and new shell theme, GTK theme and icons would contribute heavily to that, lets make users marvel at the beauty of the next Ubuntu desktop Something that will make Ubuntu desktop beautiful and instantly recognizable. I have zero skills in graphics so sadly I cant contribute with anything more than moral support and testing.