If you are able to attack a battle (with Sieges, every player who is not the protector can do so, though this may differ with other battle subtypes), you can attack with your creatures , or use direct-damage spells that allow you to either target a battle specifically, or merely say any target
While that combo is cool, its about as clunky as bouncing and recasting your enters targets, which makes me suspect this Simic commander might just be, well, clunky and slow
Estimations show that you could build a tournament-ready deck for anywhere around $30-$350 , so its not exactly dirty cheap to participate at a high level, but theres some wiggle room
This card will see problems disappearing faster than Vanish - or whatever your carpet cleaner of choice is
Previously, if there was interaction, it came from the vehicle affecting the creature