The attorneys fail the tests of 45.2 anyway. The optics aren’t good though.
No they don't. That is a bad place to argue. The starting point of 45.2 is "a personal or political relationship," in this case with the campaign. No other entity has a stake in the outcome.
Any prosecutor that does not have a stake in the Trump campaign is therefore not barred by this regulation. Comey has no more stake in this (on paper) than you or I do. The question of criminal conduct by the Trump campaign is an issue of public import. The crime would be against the public, not against Comey. Not against Mueller. Not against any of Mueller's army.
Jump to arguing the point of appointing an independent prosecutor. Do you believe they are unbiased? Do you trust them to be unbiased? Do they view the Trump campaign in a neutral fashion?
If they gave money to an opposing campaign, they are NOT NEUTRAL. They have the appearance of bias. No further inquiry necessary.