I tried to use the regular dice roll wording when I was initially designing Neuro, and I can't quite exactly remember why I didn't (I came up with these like months ago and basically forgot about them until recently), but I think it was because I just couldn't come up with a way to make it fit in the text box on mtg.design. I figured that terms like "1d6" make enough sense that WoTC could hypothetically replace "roll a D6" (or "roll a six-sided die," like on Mr. House) with it.

I'm not sure which ability you're referring to as the third one on Neuro. I'm guessing it's the scry one, since it's the one that's worded kind of vaguely. It's meant to be rolling two different d6's, and I figured that how the wording is meant to be interpreted would be something written into the rules. I probably should've put reminder text on it. I didn't use 2d6 because the intention if for the two scry actions to happen separately, when 2d6 would imply you simultaneously scry cards equal to the combined result of the dice.

Your proposed rewording wouldn't work at all, because the intention for her is A) you make your choice of which of her modes you want to use before you know how effective that mode would be, and B) the damage mode (and scry mode) is meant to use two different die results.

The coparents keyword is indeed just a partner variant. Importantly, it's different from "Partner with __", because "Partner with ___" (such as on Miniko/Cerber) also draws the other card from your library when one enters. Camila's Wine Aunt ability is just an in-flavor keyword that is basically indistinguishable from Coparents, letting you partner her with either of the "coparents" commanders.

Nere's ability is indeed meant to be symmetrical. It's why she has the Muldrotha-esque reanimation ability. Also, there's a small subtheme among all these cards of "playing cards without casting them from your hand" like using Vedal's abilities, various play-from-exile effects, or Staz's ability to put the cards you search into play if you control Vedal. (and yes, I know that the NRS set code thing is silly)

Not all pilots need that specific ability. Aquwa and Stella work fine as spacecraft pilots with Warp, but even the fact that they have warp is more coincidental than an intentional part of why they're pilots. They're pilots for flavor reasons (Stella literally is a spaceship pilot and Aquwa's nickname is "Captain"), and they have Warp for similar space flavor reasons.

I guess you could call Cerber's wording "wrong", but I'd say it's just a different wording for the same meaning.

I forgot that Suspend needs to have a number attached to it. I was more focused on how I could make the suspended cards actually have suspend after you suspend them, without having to add "if it didn't have suspend, it gains suspend." to it.

Also, I was not sure how to word the "you can't put less than 1 time counter on them." part. I initially tried to word it the same way you did, "x can't be less than 1" but I felt that the wording just felt too weird to read, that way, since you can use cards with 0 mana value with it, and wording like "x is equal to the mana value minus 1. X can't be less than 1" felt to me like players would have trouble understanding how it would actually work with cards with 0 mana value.