The devs put a lot of work into making unique looking knives of all different kinds. However, even during kill animations, we barely get to see them. I think it would add a lot through a small detail to be able to see the knife of your choice visible on your equipment at all times.
Yes definitely, I purchased an awesome looking karambit which I'd love to see on the belt. Move the water bottle to the back left, have the knife on the back right or just don't even show the water bottle. The only time I got to see the knife was when I purchased it in the shop but it might as well be stick or a biro for the amount time you get to see it on screen