Reasons to like Shannon Claire:
Shannon's great for making sure no-one ever sees that Government Takeover or Vanity Project, allowing for decks to have lower effective agenda densities (card italics are becoming increasingly instructional).
Shannon saves you from flood by letting you hide a single agenda in Archives and then slip it into R&D before it's scored, much like Jackson Howard.
Unlike Jackson, she'll survive datapack rotation.
By recurring Shannon, or installing another copy, she'll let you fetch that agenda in a timely manner.
Great rez to trash ratio.
Relatively low influence cost.