The whole command sh--t line got a bit left out during the BC rebalance, I thought they gonna change them after off-grid links get kebab’d but apparently they just got forgotten.
Go without an invul and compensate with links ;f
The Nighthawk was okay-ish when you needed the lows for processors to fit CPU for offgrid boosting modules. Now that rigs are the extension, and boosting is ongrid and tank is required, it would be better to move the slot layout as you have pointed out.
The Vulture has moved from the ugly duckling into the swan (in large part thanks to Ferox fleets). The 6/4 slot layout for mids/lows would do as well for the Nighthawk. 7/3 would do better and fit the typical Caldari layout.