I guess everyone forgets, that we are talking about a mythic classweapon here. With that “nerf” it took any sense of that weapon and is even dangerous for the user now (best example When Dragons Eye get nerfed that much ).
A perfect nerf would be, that you make it similar like other transformtroops: destroy X gems and a chance of 40% to transform a random enemy into a baby Dragon.
Since it would be pretty luckbased, a lot of players will not use this weapon in defense anymore. So win- win for everyone.