Hi,
So after using Start 8 for a long time, I've just bought the Start 10 upgrade, after upgrading to Windows 10.
I have a few problems and suggestions:
1) Problem: I'm using the Start 10 Modern Style, my taskbar buttons are set to "small" and I have added a quick toolbar (just like the one in Windows XP and Vista). I'm having a very irritating graphical glitch, that occurs sort of randomly. I have fount out I can re-produce this by clicking the OneDrive system tray icon, to open the little window. As you can see below, this switches the icons of the "Search Windows" and "Task View" and covers the quick toolbar. There is also more space between the icons than normal.

Here is how it normally looks:

2) Suggestion: Let us change the order of ALL shortcuts on the right hand side, and not just custom ones. For example, I don't agree to where you have placed the Settings shortcut as I would like to place it above or below the control panel shortcut.
3) Suggestion: Shortcut Icons! I'm quite liking the icons that you see in the default windows 10 start menu for "File Explorer", "Settings, "Power" and "All apps". If you had an option to enable icons next to the text of shortcuts (the ones you find in Modern Style), that would be amazing. For example, the user folder should have a small head, like a default contact icon, music folder should have a musical note, etc. And of course let us be able to add custom icons to each shortcut.