Sig likes orders continuing if only one ship passes. I think that for balance sake it's better that it would end if even one failed.
I would think that Orks would still remain fairly individualized. Only one of their commander options has improved LD, and is 0-1 in Waagh! fleets. Although, there is the Hammer 'tank' possibility, which would mean taking a Big Mek on a Hammer with extra powerfields, then swapping the best leadershipped cruiser with his. About the best that you can do, but still relatively sub-par compared to other fleets.
All I can say is that with Horizon's option, it will make list building a much bigger deal than it is currently.
Oh, as a side note, Orks have the most mixed role ships, which make them strange for squadroning (unless you are using ones from the same class), a Hammer has equal argument for squadroning with shooting vessels as not.