You're a bit too caught up on these extra bonuses. Most of the Legion rules are fluffy and fun, not competitive. You run Night Lords because you want to run Night Lords, not because you think they'll win games for being Night Lords. It opens up a handful of options though and one of the biggest is taking Raptors as Troops in a CAD. You can take units of Meltacide Raptors with Obj Sec, freeing up the FA slot for nothing but Bikes and Heldrakes go in a seperate Formation. You can make a legitimately fast army. If you want more Deep Strike, then yeah, you need a Fortification to help fix your Reserve Rolls, but oh well. You have points to spare by not taking tax units. You can make it really interesting and unique on casual tables, but Night Lords won't have a place on a competitive table without a damn good player in control.