This New York Times editorial describes the Texas prosecutor's misconduct and offers this take on the punishment:
This case may sound extreme, but prosecutorial misconduct is far too common, and the remedies for it, if any, usually come long after the harm has been done. Criminal defense lawyers have called for judges to issue a standard written order reminding prosecutors of their ethical duty and to warn them of contempt charges if they do not comply. Prosecutors should welcome this practice to reinforce professional standards and identify the wrongdoers among them.
This blog has regularly covered cases of prosecutorial misconduct (e.g., here, here, here, here, here, here, here, here, here, here), so it's nice to see the issue getting the attention (and legal response) it deserves, at least in this particular case.