It would be interesting to do an experiment on people playing one another (online) with these pieces vs regular pieces (e.g. one player with a regular set and one player with this set). Because I do feel like I can visualize the state of the board more easily with this approach--but would that translate across people into better play, or is there some point where a more expert player (I don't play very often, though I enjoy playing and have played for years) has already internalized the mapping from piece shape to movement. But that said, it does feel like the difference between font styles in programming, which for me have a very meaningful impact over time.

Edit: Though good point to the parallel commenters, the knight shape is harder to differentiate and kind of throws me off. But maybe tweaks there.