Honestly Azir is fine right now
I've played a ton of azir and I'd say Im decent with him. I think he is perfectly and in fact he is perfect for how the meta is going. Just go nashor's and rylais and you are a beast. He is also a great seiger with his tower. One thing I would say is maybe in late game enable his 3rd soldier. Other than that azir is great! No need to change him