Call me insane but, Jarvan IV buff idea

As we know J4 has always been a staple character in League of Legends with great initiation, damage absorption, burst damage and disruption. We have seen him played competitively in Top, Jungle and Mid as of the summoners rift update. But I feel like something is lacking from his kit. Recently I answered a questionnaire for Riot about champions. I got Jarvan IV as one of them. Here was my idea.

I felt since Jarvan IV is supposed to be the "Leader" who bravely goes in for his team. He is always the first one to go in. With his E ability Demacian Standard. He gives himself and his allies Bonus Attack Speed. SO why not buff minions? With the recent removal of Banner of Command, I feel Jarvan IV's flag can take its place. What I am aiming for is the flag creating an AOE minion buff that grants them bonus resistance (scaling with the time of the game) and a flat attack speed ratio just higher than what he gives champions (Think AOE Nunu's Blood Boil). Since the flag doesn't stay that long, I feel like this wouldn't be "busted".

I believe this is a healthy way to give Jarvan IV more tools to help his team as the leader. I am sure Riot has tested this option before and sensed it was incorrect. But I feel like this would allow Jarvan IV to come into Top lane again without buffing his damage or tank stats.

Although, since Jarvan IV is such a basic character who isn't technically "bad" I feel like this buff will put him straight into pick or ban again.