SM043: Gym Battle! Z-Move VS Mega Evolution!!

Regarding whole battle between Ash and Brock, Misty. Im aware how Z moves are next new thing coming from Nintendo and Gamefreak workshop, but does that really mean it would have to go down the alley of Ash demolishing Misty and Brock pokemon?

Making Rowlet, Lycanroc or Pikachu with Z moves as dominating unstoppable force, down playing incredible power mega evolution in itself presents?

With Lycanroc or Pikachu dominating over mega evolved pokemon despite that looking unconvincing and forced imo.

I dunno from story standpoint what sense would it make to bring back Brock and especially Misty after so much time and on top of that making them few of rare owners of pokemon capable of mega evolving ion entire pokemon world. Just to see them plummeted and destroyed by Ash in battle?

Especially when Steelix and Gyarados are in general incredibly powerful pokemon, real beasts(especially latter one), and with mega evolution their endurance and strength reaches a whole new level.

Beside who else is already bored by constantly seeing Pikachu defeating Gyarados?
First against Claire, than by Crasher Wake, followed by Lysandre Gyarados falling victim to Ash as well?

Isn't it time for this specie to have win for change instead of nerfing and downplaying its true potential, once again falling down easily to Pikachu yet again?
And Ash winning streak in SM is becoming rather highly uneven so far, so easy win for him once again would feel underwhelming and kinda forced, at least to me.

Its not like Z move cannot be survived leaving Pikachu vulnerable afterwards. Or if its well planned countered by some move of great power or even dodged. Granted with way Z moves have been portrayed that's hard, but not impossible.

Realistically im not expecting Gyarados defeating Pikachu, although i wouldn't mind because powerful water pokemon can overpower electric species, especially with power up like mega evolution.

However maybe there happens compromise with Ash battle vs Brock and Misty ending in tie?
Portraying both Z move and mega evolution as upgrades of equal power?

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