I think it's a good decision. Those who are really into creating their own BP's (raises hand) will still avoid using somebody else's prints. This is more QoL than anything as remaking a blueprint you like just becomes tedious between games. Other playstyles almost like to compete to see who makes the best print and that can foster a healthy community in the game as well.
If blueprint sharing becomes a thing, a question that remains (for me) is how to encourage new players to try and build first before copying a popular third-party blueprint. There may be no simple answer without straying down the path of artificially constraining yet another style of play, or harming a potential sub-community.
So, keep improving the overall build experience and let the chips fall where they may.