I just think we need to be more clear about what we are trying to accomplish. If we are trying to basically have a Chaos Lord variant for IN, then let's make that. If we are trying to have a specific character type for those who are playing Battlefleet Cadia, let's do that. Or, we can do both.
1. Personally, if we make a Chaos Lord variant for IN, it should be allowed in each fleet. Every Chaos fleet has a Chaos Lord choice but none of the IN fleets have secondary characters.
2. I would like to see Battlefleet Cadia be somewhat usable. At this point, it's a terrible option. The fact that your entire fleet has to roll 2 dice and pick the lowest for LD is atrocious. Yes, they can pick Veteran Captains, but I don't think that makes up for the downside. Even at 25pts, I don't think it's worth going with BFC.