Well thankfully Nick fixed Bloom's voice, ugh that voice sounded so annoying!
Now as for how the movie could have been improved. I really wish they gave the Trix a form to correspond with Believix. Like perhaps it could have gone that when the ancestral witches disrupted the balance of magic, causing dark magic to take over, it could have resulted in the Trix getting powered up to gain the new form. I would have been even be satisfied if when the good magic returned that the Trix lose the new form. They could have called the form Shadowix.