Couldn't a person A submit feedback to my personal link simulating that he is in reality person B, maybe to his own benefit?

Also I'm sad to admit that some feedback requires pinpointing specific examples of things that have actually happened, so I would use this tool as a complement, but not a sustitute.

Otherwise, sounds like a great idea, I agree that all feedback without anonymity is wrapped into layers and layers of "kindness" to not sound too harsh, which can make you miss the point the feedback wanted to address.