No custom ROM is perfect. The Samsung Galaxy S6 Edge Pixel Experience has a few quirks:
It’s a bittersweet transformation. The Pixel Experience breathes new life into the S6 Edge by replacing Samsung’s heavy TouchWiz with clean, fast Android. However, the phone’s aging hardware (poor battery, heat issues) holds it back. samsung galaxy s6 edge pixel experience
The default TouchWiz launcher is the biggest offender. Replace it immediately with Lawnchair 12 or Nova Launcher (with a Pixel theme pack). No custom ROM is perfect