I'd love the ability to turn on auto-play, an increasingly common mobile RPG mechanic. Don't feel like doing the dishes, or have to crank through that stupid project at work? Just turn on auto-play, and sit back and relax while your body does the work!

I would love to high insight so I could better understand what people are thinking and have an easier time with communication.

Maybe a simple one but I would really like to summon a "vehicle-mount" whenever and whatever I would need ;)

OMG. What if I could jump as high as....Samus, Mario,
Lara Croft, any castlevania character and many more that can jump above there head. Or "DOUBLE jump"

I would love ability to rest and then completely heal. Dying? take a long rest be good as new. Broken leg? Take a rest good as new. Arrow to the knee? Take a rest be like it never happened!
Your party is dying with you? Make them all long rest, good as new to continue the adventure.

Up up down down left right left right B A

Time loop mechanic. Like iron Danger would be cool!

Save scumming. Would love to go back on decisions and get the result I want.

I'd like to have different save files, to either retry something, or quicksave before doing something risky, to relive a happy memory, to live two (or more) totally different lives, and basically be immortal in my life time, constantly gaining more and more knowledge, I'd be a god.

As my real life character class is Engineer ;) quite simply what I would like is the RPG ability to craft any number of complex items instantly, and often without the need for a workbench too boot. For quite simply if I was able to be a human 3D printer I would totally be able to rock things up in this reality like there was no tomorrow and quite possibly even give the likes of Elon Musk a run for the money on innovative product development.

Jalopnik:com/why-we-re-building-a-post-apocalyptic-electric-car-5841732

I'd like to have "protection against alignment" , so that, so long as I can read the other person's intention, I can at least prepare myself for the incoming damage (be it physical or emotional).

I would love to have magical abilities like in the Elder Scrolls. You can play a prank on someone with the telekinesis.

If action RPG counts,
Rebreather augmentation in Deus Ex. I love exploring old buildings but it comes with exposure to asbestos, lead dust, black mold, all things requiring appropriate PPE. I'd use the rebreather to explore old spaces without worry about bad air or any problems with my respirator.

Abandoned places are beautiful, but risky. A rebreather augmentation could open the door to an intimate view of the past.

If I had to choose only one skill from a RPG, I would have to choose Fireball. Yeah, I would probably end up in jail ou Area 51, but at least I would be able to use the sentence "Bold words from someone in Fireball distance". Also would be able to score the sickest basketball dunk!

Repair Toaster. Too useful not to have!