Overall, the final suit was good, but there's a huge issue with it that they can fix very easily. Get rid of the clothing area around his neck and jaw.
Personally, that was the biggest issue I had with the red suit; the neck and jaw area. I think they need to get rid of the black clothing he wears around his neck and face. One of the reasons why his ninja black suit looked so good its that he had nothing around his neck and jaw area. So those areas had more room to breath and he looked lean and badass. He didn't look as...smushed. In his final suit his face kind of looks puffy, because the neck and cheek areas are getting smushed in by the suit. They need to let his face breath. Let it be exposed.
When he wears the red suit, the area around his neck and jaw look really awkward because of the black clothing he's wearing.
I understand the "practicality" of it, because it's suppose to protect his neck, but I think they can sacrifice that one aspect for a better looking DareDevil.
If they got rid of that neck and jaw lining and let those areas breath, he would look much better imo.