I actually prefer the light armored look. They're soldiers first, pilots second, so it makes sense for them to have some degree of body armor. I mean why have a blaster if they're only meant to pilot a fighter craft? I can think of a few hypothetical scenarios where a pilot might need the armor and blaster - an assault on their base where they need to fight to get to their TIE, crash landing behind enemy lines or even a mission that requires landing and getting out to complete some sort of tactical objective. In other words, the way this new TIE pilot is outfitted makes sense to me.
I think what made the OT Tie Pilot's helmet look so large is the lack of any armor on the body. If they had even upper body armor like regular Stormies, the helmets would look perfectly normal.