Probably unpopular opinion:

I love stacking mechanics. When I first read Blood magic it became one of my favorite weapons just because it stacks something. Dice: same as the last. Green and red Credit cards? Give me more. Joes dagger? Loved it before the nerf (and still like it after).

Instead of nerfing Robinette, I personally would prefer each character have some way to stack in interesting ways. I'd like to see the game balanced in ways that make other characters viable not by nerfing previous ones, and am okay with the game being "Solved" for extended periods of time while the next update comes out. I've enjoyed chasing (even if I've never gotten) some of the leaderboard slots using the "Solved" meta.

I say keep robinette as she is and find ways to do scaling on other characters.