About IAB in general, sometimes not directly related to the write-up:
Every intelligence service should not be a shoot-things-up faction. That's what the military is there for.
Intelligence Agencies should really focus on their main objective (gathering intel, providing politicians with it, infiltrating enemy organisations, keeping homegrown terror in check...) which would put a big focus on inter-faction forum roleplay, rather than ingame action and shooting.
I also don't see that Intelligence Services have the powers that the old IAB claimed. It was that they basically claimed to be above the law and that their word is law. That was definitely too much power. Keep in mind that your faction can only have as much power ingame as your fellow players grant you.
The role of IAB should be imo to gather information, to talk to the responsible persons (Bretonian government, Military) and then do what has been agreed on. Of course they can act on their own sometimes but starting a war is not something they can decide on their own, also declaring lawfuls unlawful is nothing they can do. They are agents. Not policemen. Not military. Not politicians. They are much smaller than the last IAB was.
I'd generally call for moderation when it comes to the question "how powerful is my faction?". People hate being bossed around. Even more so when the expectations (based on the last IAB performance) are not good.
I saw that cap ships are mentioned. There is no need to have them in IAB. I don't have a problem with a mobile base capital ship as a rp device, though. I could also imagine a luxury liner for that... would add a touch of exclusivity and style (think about James Bond's vehicles or M's appartment).
I won't comment on the leadership question, as Zealot has asked for this argument to cease. I think my opinion is sufficiently clear.