My idea for keeping Blizzard relevant is a little more annoying: when you have Paradox ready, only the opposite-element spell's button becomes Paradox; the same-aspect spell stays as-is. So you use Blizzard to cast Paradox in fire mode, and Fire to cast Paradox in ice mode. This is technically a flexibility increase since you might, hypothetically, want to be able to use a weak 2.5gcd spell to push a bomb or something while saving your 500-potency 2.5gcd spell for a real target.