I've noticed the following weapons/systems are missing their compendium entries in the LCP:
Magnetic Hypercompression
Moonshot Module
Butcher's Block
Suicidal Embrace
Personal Tachyon Shield System
Dem-0 Charges
Scout Rifle
In addition, the Rapid Nanite Autonomy system is mistakenly named Decoy Autonomy, and the Toxic Lock exotic system is missing. I hope this helps.