Great suggestions in my opinion, I stopped using tornado cause it couldn’t kill bats anymore and I’d be willing to sacrifice some of that pull strength if it means killing those swarms and still being able to pull hog to the king tower without taking damage on the princess tower, albeit having a smaller window to time it correctly due to the decreased pull strength; and except goblin barrel travel time, I think they’re very solid.
If I had to suggest what kind of buff were to be given to the freeze, I’d say make it one shot equal level spear goblins because leveling up freeze only adds damage, only useful for killing swarms if paired with graveyard or balloon (besides the freeze itself).