Oldmandan

Jace can't read. He just alters everyone's memories so they think he can. This is canon, and no one can change my mind. :P

Mod support has definitely been mentioned as an eventual goal, IIRC though they didn't have plans to implement an official DM mode.

Wotc can do this, sure... so long as they restrict it to BO1. In BO3, decks needing to run a couple pieces of hate/interaction in the sideboard to deal with a linear combo is good for the health if the game, if anything. (If that's still not enough, then sure, ban it globally. But BO1 and BO3 are fundementally different games.)

The VA for Laezel (Devora Wilde) has actually seen this meme and read it in-character. :P You can find it on YouTube.

I could see that. She's got some thematic ties to Karsus, shares a home plane with Shar, and has a portfolio revolving around lost knowledge (ie, a potentially attractive avenue for recoving an amnesiac's memories) giving options for a subplot around her to resonate with a couple different origin characters. (And could potentially serve as a more "benign" (for certain definitions of the word) source of power to Wyll, if he wanted to retain his powers but escape his contract with Mizora.)

In terms of extremely minor one-off characters, He Who Was was very cool. I was sad when he didn't show up in act three. Just a random Shadar-Kai warlock of the Raven Queen chilling in the Shadow Cursed lands, delivering warped justice to the dead, and collecting their tormented memories and emotions to sustain his queen.

Worth noting, if you're dual-wielding, you can sneak attack with a bonus action. (Go into your reactions and make sure Sneak Attack is set to always.)

AT is mostly about adding control and utility abilities to the Rogue; options to take enemies out of the fight, and aid/supplement your sneaking. Sleep, Colour Spray, Hold Person, Invisibility, etc, are your mainstays. Your unrestricted spells (ie, ones that don't have to be enchantment or Illusion) should probably be geared towards defence and mobility. (Shield, Misty Step, etc.)

IIRC, elves can sleep properly, if they want to, they just generally choose not to. And depending on the age of the elf, they do "dream" in their trance, IIRC. Said dreams are memories of their past lives. (Since elf souls are special and don't work like regular souls.) Realistically though, none of our companions are in the right age range (dreams being super rare for elves older than ~100 and younger than ~600). Astarion might dream normally though, if he ever sleeps*, severed from their reincarnation cycle as he is by his nature as a vampire spawn?

When in doubt though, blame tadpoles. :P

Move over spherical cow, circular cat is my new best friend

Generally, no. (Often there are explicit clauses in the EULA for various content creators.) But it's a grey area, one where other companies have occassionally chosen to enforce copyright claims despite the convention, usually punitively when someone has done something egregious (or just that the company dislikes). (EG, the whole Pointcrow-Nintendo debacle where they threatened to take a youtuber's channel down because he was promoting a mod he comissioned for Breath of the Wild.)

Nay, although there have been a couple times losing a stack of lockpicks consecutive lost coin flips where I almost regretted it. :P