These pieces from Wendy Kaminer shed a fresh perspective on the Citizens United Case — a bit argumentative, but definitely worth reading.
The call for overturning Citizens United does appear to be misguided in my view, as I have previously suggested in this thread.
The perils of a constitutional amendment that determines that corporations have none of the protections afforded individuals by the Bill of Rights include greater ability of government to limit the activities of corporations like Planned Parenthood — consider the foundation of the rulings made in this case Planned Parenthood of Missouri v. Danforth which was decided after Roe v. Wade, and spoke to the rights of physicians to perform abortions. The court did not find it necessary to address the constitutionaliy of a restriction on activities of Planned Parenthood, because it struck down Missouri’s laws as invalid restrictions on the activities of individuals. But in post-amendment world in which corporations have no constitutional rights, nothing would stop a state from prohibiting Planned Parenthood from operating a facility to perform abortions (while allowing physicians the right to practice as individuals).