I was skeptic the first time I read on this forum the idea of the character was completely changed, but after playing the final game "the Guardian" turned out to be a net improvement over the original Daisy and one of my favorite changes.
I really liked the character and how it made me second-guess constantly if I was being deceived or if her actions were in my best interest and her advices sound.
At least until the part where we got the reveal of who "she" (in my case) really was. That felt... a bit dull as far as reveals go.
I hoped for something a bit more exotic than just the "Emperor".
It would have been a somewhat solid change if there was any actual payoff. Whether you trust or distrust the guardian, follow their advice or don't, stab them or don't - none of it makes any difference. Whatever you might think of "Daisy", at least her appearances were rooted in player choice. Shame we'll never get to see how it would have played out past act 1.