I though same and I just don’t have any idea why the gel cannon does not have aoe damage at all even 9 tiles. It’s not explosive and not ap. It should have at least 9 tile of aoe.
For multi ammo, to be honest when I got the game I already thought there are multi ammo choose in this game because the devs are from first xcom. So I don’t think they will miss this. When I saw there non, it was a huge disappointment.