Weird thought on a 3/2 with a combination self-defending drawback/bonus. Probably bad.
3/2 Agenda (Weyland, or Neutral w/ Influence)
While Fact-Finding Investigation is in either player's score area, it is worth 1 less agenda point for each power counter on it (to a minimum of 0), and each ID gains "[click], trash a card from your HQ or grip: Place 1 power counter on, or remove 1 power counter from, each copy of Fact-Finding Investigation in either player's score area. Use this ability no more than once per turn". An ID only gains this ability once, even if there are multiple copies of Fact-Finding Investigation in score areas.
Mechanically, the idea is to have a 3/2 (strong) that either player can, with effort, invalidate, but the other player can work against it. Furthermore, they're linked, so if one is scored and another is stolen, you hurt yourself by using the ability, too. The original idea was to make it cost 2 clicks, but that gives the Runner an advantage, so I figured a click and a card would put Runner and Corp on more even footing.
Thematically, I wasn't really sure where to go with it. It needs something where devaluing its value to the Corp also makes it less damning to them, and controlling the damage if it gets out likewise means making it less useful. Some sort of evidence or investigation was the main thing that popped into my mind, with a coverup rendering some of the findings less valuable because there are holes in the story. There are probably better ideas, though.