150% more damage for the first meteor sounds great, but it still only just barely makes it slightly better base damage than Armageddon Brand. But you don't need to recast a Brand, so it still has less mana efficiency. Maybe if you scaled added damage, but then why not just use Fireball?

Furthermore, the duration and frequency of Firestorm was reduced as well, so unless the area of effect of each smaller meteor is also substantially larger or the secondary radius is much smaller, you're getting less damage per cast on average as well.

And that's also assuming it doesn't suffer from the problem that plagues Armageddon Brand, which is the drop time of the meteor. If it drops slow enough that some enemies can avoid it, it's even more garbage since the front loading of damage becomes unreliable.

It just looks worse the more I look at it, and I'm really hoping I'm not right in my judgement because it just looks so cool and my disappointment, while not immeasurable, is still immense.