Instead of creating new shitty gimmicks, why don't they expand/improve on the current battle system?

Why not change the way typings work?
QoL changes:
>Dual Typed Pokemon's Second Typing gets 1.25x STAB instead of 1.5x.
>Dual Typed Pokemon's weaknesses/resistances are lessened

Example: Instead of Fairy moves doing 4x damage on Hydreigon, they now do 3x damage.
Instead of Grass moves doing 1/4x damage to Pokemon like Dragalge, they now do 1/3x damage.

Move Combos are expanded upon.

Example, remember how Grass Pledge, Water Pledge, and Fire Pledge were used? That except for all the moves.

>Double Battle
>Flamethrower and Hydropump used
Defog effect
>Water Move + Hurricane
Rain effect if Hurricane succceeds.
>Trick + Thief
Trainer decides who has what hold items of all Pokemon currently in battle.
>Moonlight + Moonblast
Misty Terrain created


Additionally if certain moves are used in order, they get additional effects/cool animations.
>Double Team and then Water Shuriken
Additional damage for Water Shuriken
>Rage and then Thrash
Additional Damage
>Fake Tears and then Sucker Punch
Negates the need for the opponent to use an attacking move to be hit. Additional Damage done.
>Yawn and then Slack Off
Restores all health and status effects
>Hypnosis and then Dream Eater
Increases damage done by Dream Eater
>Agility and then Baton Pass
Baton Pass gets increased priority
>Celebrate and then Present
200 BP for Present. Meme move.