I disagree with the idea that civilian firearms should be limited to obsolete military firearm designs. For example, bolt actions instead of semi autos. The state of the art and the state of practice in civilian arms should not be limited like that. For example, semi autos have been standard for longer than bolt actions were standard. In other words, semi autos are normal, mainstream designs.
Likewise with the notion that civilian arms need to be made with wood. Why? Polymers offer more design flexibility, lower cost, and have improved stability over a wide range of temperature and humidity.
Ergonomic improvements should not be limited to military weapons. If a more pronounced pistol style grip results in better performance from the shooter, it should be standard, and it has become so except for nostalgia buffs.