Nice report, thank you for sharing
Just one correction - this is NOT SN flagship lounge - THE LOFT in Schengen area is the flagship lounge. Also SN African flights depart from Pier A (which in the morning is Schengen/non-Schengen terminal and becomes dedicated Schengen terminal only when the last flight to Africa leaves) and there is a dedicated lounge for these flights called 'SN Sunrise Lounge'.