The trigger from Surprisingly Loyal can be a great way to score for Frame for Murder if you have a low wound model close by, possibly the Scribe since people tends to want to kill him anyway.
Legalese is a must have if you face a good gremlin crew (or Mei-Feng) with Sparks.
Watch My Back has been great for me, but I tend to make very Guardsmen heavy crews with Lucius.
But I agree with you. None of Lucius upgrades are really necessary. I would love the Secret Assets if it didn't require a ram. I would have been fine with a Tome since no one else is using that suit, but now your Rams are best used elsewhere.