If it is not hard to implement as much CA as it is available, then it has to be done IMHO.
Every NPC faction might use the best suitable for them, they also might be coloured as it is on FO2 (or isn't it?) or something else. Variety is always good. We have only one "special armour"-tesla, against EW, why not to get some against fire(...water, wind, earth) or something else?