To be fair, Sir Shadow, Cicatrix has been overshadowing the warlords recently. That may just be because the warlord players aren't always on, and/or you have strategy you really want to share, but GW has a point. Cicatrix only popped this morning; there are things he shouldn't know. If you're just roleplaying Cicatrix as stubborn, then that's different, but you shouldn't do that to a point where it starts to frustrate the other players.
I will concede that your character is allowed to have strategic knowledge. It's inherent in all commanders. But, GW's right, being a chief gives power, not knowledge. It's your unit type that determines this knowledge.
Being a caster gives magical knowledge.
Being a warlord gives tactical and strategic knowledge.(And I guess Metter being a diplomat gives him tact-ical knowledge. )
But perhaps, for the sake of speeding up the game, rather than Cicatrix asking the warlords what basic strategy is, we can assume he learned by watching? With the timezone issues, rather than having five posts that informs his character on strategy that'll slow us down by a day, we can get into the meat of things and continue to war?
Your strategic knowledge is inherent as a commander. A warlord's tactical knowledge is reflected in their ability to learn specials, their leadership, their combat prowess and their superior levelling curve. Cicatrix can know all he wants about strategy, and offer advice on it, but when it comes to combat he'll be useless. His bonus to the uncroaked is a leadership bonus only by type; it is not representative of his tactical ability, but his magical connection with them. When it comes down to a fight, Macho and Tank would handily defeat a caster of comparable level one to one. Metter, being a diplomat, would be probably evenly matched.
Your characters, or even you, may butt heads; but let GW have this one. He's a warlord, this is war, this is his role. You'll get your spotlight once the battle's done and croakamancy calls. Trust me.
Perpetually locked in a Mathamancy/Turnamancy link.