In the unit blue print for the Loyalist, Mega Armor is referred to as 'TriArmorHalfSpeed', however, in the actual game this ability is only what we currently know as Mega Armor. It doubles your armor and reduces your speed to a fifth.
To be more exact about the double armor, it provides Damage Reduction -.5 or 50% which is not stackable with hunker any more (remember nuke surviving loyalists?).
My question is do you use Mega Armor. What do you use it for?
Personally, I find it is very helpful to put your loyalists in front of your megaliths and use it when the megaliths are attacked hard. It is also ok verses pds and bases in general.
Would you like to see Mega Armor improved in some way?
Right now MegaArmor provides only a fifth of the regular speed. What if Mega Armor was 'HalfSpeed'?
Balance & Playability Mod has included this change in the latest version. Feel free to check it out here