Dont remove "Open with Explorer" in SPO and OneDrive for Mapped network drive
Open with Explorer should stay in OneDrive and SharePoint both
Ben check out Zee Drive for mapping network drives to SharePoint Online and OneDrive for Business http://www.thinkscape.com/Map-Network-Drives-To-Office-365-OneDrive/
Ben Bazian commented
More than happy to have this functionality added to Edge.