This issue is the massive armour debuff that it would apply to her. Even if she equips her exclusive equipment (Special Warfare Mobile Suit, gives +20 armour, +10 evasion, -10 RoF, -20 accuracy, at max +10), it would still completely destroy her armour stat, which is the main reason to use her since she can’t mod 3 and is the only AR that can equip armour.