@dr-j She's very good against Dredge in post-board games as a way to shut down Bazaar of Baghdad after you've stopped their main dredge plan. Like Leovold, she was never a part of the "Dredge Hate", but once you Crypt their yard or land a Cage or Yixlid Jailer (or Leyline) and the Dredge player has to dig for answers, Narset shuts the door on their best means of doing so. The fact that Narset digs for additional hate or protection makes her even better than Leovold.
@Dr-J She's still good as a sorcery speed impulse for 1UU, gain 2+life and maybe stay on the table to combo with dack or a draw 7. Just not insane. But I mean, this is literally like arguing with myself from before the set was released and I played with/against the card and tried the countermeasures your recommended. The problem is that the scenario of landing a 2/1 doesn't make Narset that bad and a lot of the time they can answer your creature. Because they are Blue and run Force of Will or Swords/Bolt/whatever or won the die roll and this format has Moxen and Narset costs 3 for some reason so it can come down on turn 1/2 pretty frequently.
I also feel obligated to point out that all of these decks that you are likely to describe cannot be metagamed to have game against Shops. Like Eldrazi metagamed to have game against Shops, it just doesn't exist within the constraints of the format. Like a twitter poster literally said "I was running 12 SB cards against Shops and the matchup was still heavily unfavored"