In case someone gets around to doing this.

Directly Modifiable Permanent Unit Stats

Implied from  http://spring.clan-sy.com/wiki/Lua_SyncedCtrl:

• Cost
• Max health
• Experience
• Lineage
• Metal extraction
• Build speed:
  • buildSpeed
  • repairSpeed
  • reclaimSpeed
  • resurrectSpeed
  • captureSpeed
  • terraformSpeed
• Flanking
• Weapons:
  • reloadTime
  • accuracy
  • sprayAngle
  • range
  • projectileSpeed
  • burst
  • burstRate
  • projectiles
• Collision volume
• Stealth
• Sonar stealth
• alwaysVisible
• Cloak:
  • Type
  • Decloak distance
• Sensors:
  • los
  • airlos
  • radar
  • sonar
  • seismic
  • radarJammer
  • sonarJammer
• Resourcing

Note: Many of these aren't good ideas, they just exist.