Mono
deck stalling (Fahrenheit, Fire Lance and Cremation for the fast start) very effectively. If your deck is a mono, it can cost 9 or more, you'll use it, because it's still worthy. SoBr benefits on high
amount too. If you are in a duo or more, it's still an usable card. It's elemental difference.
works fast, so there's need for a cheap, beneficial spells.
needs crucial spells for high cost. Actually, your opinion is right, because raising the Thunderstorm|Lightning storm damage to 2 made this card much worse.
If there's need for a buff, I think more damage is needed (Actually, Desiccation|Lighning storm does more damage for much cheaper cost). Fire storm now is not a crucial mass CC, just "if I need +1 more damage for much higher cost than any CC". Of course, if it makes 4 damage, the cost must be a bit more (2 Thunderstorm+ in 1 card can be 8
or 9
and upped can be 6
or 7
). It's still will be a bit worse than optimal in a compare, but
cards not for the price, for the effectiveness no matter what.