Here we are again. Dell blocked the last fix so here is a way to restore normal sleep in the latest bios/windows version

Press start -> type: regedit -> press enter. Then navigate to:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power\

in the right side of the window right click and select “new”

Enter the 32-bit DWORD value PlatformAoAcOverride and set it to 0.

reboot and normal sleep should be restored (might have to reboot twice for wifi)

If you find any problems just delete the file you created. 

Warning! messing in the registry might break windows. For me and others it worked... no garantees.

EDIT: for some insane reason you have to open and close the lid twice before you get wifi back. so not a full fix.