Does the clear view case still scratch the screen?

With the S6 Edge, the clear view cover scratched many screen. Is this the same with the S6 edge+?

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After repair, Sense 6.0 needs bootloader unlock and root from scratch

I got my m7 repaired and they reset the phone to Sense 6, removing all my bootloader unlock and root etc. I need to start from scratch. What's the best way to get it unlocked and rooted? There are threads from 2013 but they don't apply to Sense 6.

Can someone help?