Either way you are going I am for the visor simply cause he feels like a badass personality either cocky or stoic, but not like a mother Teresa with the giving and the being liked. This is war after all. Ofc if he is a futuristic character the odds of him doing combat in lethal gas or none terrestrial planets means he would need a full mask. The other argument to be made is that if the future has the tech to make a full face helmet viable in combat then it would be a tactical disadvantage to not have it on.
If you wana go for the open face it is viable ofc. I would eliminate the helmet completely. Then he would be seen a moral booster a fears and fearless commander who's face alone inspires hope and courage in those around him.
Ultimately you need to keep your character in mind when deciding this what would he do if he was gearing for a fight or picking out his armor in the forge.
PS. This is all assuming he is on the light side. That's the vibe his armor gave me.