hey zharmad, glad you are enjoying the mod
short answers
1- balance, they are immobile, so it´s kind of easy to get around immobilize target´s ( they only got 1 turn to act the rest player can go around)
2- Again since they are immobile we can´t have grenade exploit so under armor got to go up! when melta were made there plan was to be just a better grenade, so i guess it can be revised
3- Guard legacy, no marines don´t have, but we leave there maybe some day may will.
4- twin-linked weapons are standard craft weapons. both vehicles can equip
5- Adamantium forges have storage space guess that overrides manufacture
6- it´s unblockable since it´s "corruption" no armor can save you from tempting word´s (imagine what that girl whispering to his ear), they are ussless if you have assault armor/ also chaplain is immune to conversion but can die