Hi,
VLC doesn't look too good on High DPI devices like the Surface Pro 4 or the Yoga 2 Pro, both with 200% scaling. The UI tries to scale and provides sharp rendering of HD videos, but the toolbar and other UI graphics are too tiny to click comfortably. That makes the program almost unusable on such devices.
I've read somewhere in your bugtracker that VLC 3.0 will support proper UI scaling. But I couldn't find any information about version 3.0 except uncategoried nightly builds. What's the current status here, when can we expect an official 3.0 release? Seems it's being worked on for years already. Is it made to be finished? Or is v3 today good enough for daily use?
Have you already considered per-monitor DPI, available from Windows 8.1 I believe? If that's not handled by the application, the window will be all blurry again when moved from a high resolution built-in monitor to an external normal resolution TV for example.