The biggest problem I have out of all of Season 5 is where and when Aisha earns her Sirenix wish because here's the awkward truth.

Everybody else, except Musa who never attempts to earns hers, earns their Sirenix wish after they pass through their channels. Flora saves Paradise Bay, Tecna saves Zenith city. Stella deliberately challenges her parents to get along for at least one day by admitting how hurt she does feel by their arguing. Bloom by defeating Tritannus and gaining her dream come true wish the power to reverse the Sirenix curse.
It doesn't feel like Aisha earnt her Sirenix wish more that it was just handed to her on a Silver platter. At least with Bloom earning her Enchantix by pure willpower she also earnt her fairydust pendant by listening to Maya's training and progressing through it. I think Aisha should have earned her wish to heal Nereus at the same time Bloom did to save Daphne. If Bloom had snapped her out of her anger maybe Aisha and her could have worked as a team to actually have defeated Tritannus in the Season 5 finale episodes. (I think that is something people will appreciate in your rewrite for Season 5 to move Aisha's earning her wish back to where Bloom earns hers. I'm not doing it in my book so that's all out there for you to use in yours, friend. Pyrix_Fairy )