some suggestions for start10 

add all the various types of fluent design glass types so you can choose between them including the color

get rid of the old style scroll wheel and replace it with the smoth scrolling of the original windows 10 startmenu

let the user choose between icons or text for the sidebar of the startmenu and add it to the left side like the windows start menu

i like the windows 10 startmenu but it has no way of pinning apps that i use theres either tiles you have to add or just use a huge list of apps, i prefer the way of big pinned icons then pressing all programs to get the rest i would prefer if you made start10 like the windows 10 startmenu but added that to it, including smooth animations like the windows 10 startmenu, and full customization of the color to get any type of fluent design look thats available in windows 10