Tha works if you are making an attack, but Doctorbadwolf also mentions the Warlord should be able to put insight dice when using a Shout in the first five levels.An ally attacking the same enemy you attacked kind of creates a positional limit. A bravura warlord making himself vulnerable to do it is perhaps putting advantage limit on it. Just more food for thought
Maybe I could make it so you place 1 Insight Dice when using a shout so that until you get to level 5 it's more or less equivalent, but starting at when you get Extra Attack you get more efficient?
Feels a bit clunky though...