Really? There are a number of unique items added to the Warriors to distinguish them further from the previous generic costumes. Many have unique vambraces, tattoos with the Legionnaire logo, unique faces, unique belts, unique jeans. There are a mix of normal costume pieces for the lower tier Warriors and an obvious design influence from the movie that inspired the enemy group.
As for high resolution models, you're setting your expectations far beyond what a twenty year old video game can achieve. The Homecoming Developers have the same game engine constraints as the legacy developers did back on live.