Arenvald Lentinus is a Scion. A hero. A friend, who heedlessly and without hesitation gave of himself to offer salvation to a traitoress that so many others had since written off as irredeemable. He sacrificed a crucial part of himself, something he'd never have returned, to the cause of the eradication of the mad schemes of the utmost villainy. He is valuable, and he can contribute yet more to the cause. Many enjoy him, and would see him return to the fold if such an eventuality were to be put on offer. Cid nan Garlond is the premier genius of Eorzean Magitek. He is capable of many things, including the restoration and retrofitting of an Allagan superweapon eventually made useful to end other, more malevolent Allagan superweapons. Magitek is also capable of much. The world of Final Fantasy XIV is loaded with ingenious and revelatory Magitek, and this can be put to prominent use to either restore of bolster the use of Arenvald's legs.
For too long now, our friend Arenvald has quite literally sat on the sidelines. Pointlessly meandering, only to be wheeled out to be a glorified cheerleader. A criminal act of the highest caliber, when he can be so much more. His presence is a shining beacon to all who witness it. Bring him back, Square Enix. Restore one of the prodigal sons of the Scions of the Seventh Dawn to his rightful glory, and place at our side. I, and many others players I have precious little doubt, implore you to find it in your hearts to do so.