The game is not designed around "nice gun fights". It's built around having multiple weapon choices for multiple ranges for encounters. You have certain weapons to force or defend against offensive engagements and others for supporting/team fire. Without special, the game comes down to rock/paper/scissors where it's a matter of who uses the right primary for the right situation. If everyone uses the same primary then great. But if I have a doctrine/TLW then I could easily camp and not have to worry about you with a nirwens/scout. As it stands now, people can have a versatile load-out when complimenting their primary choice with their special, which fosters a more dynamic playing experience. On top of that, when you have certain melees much more powerful than others, it inherently gives an advantage to those classes when you remove special from the game.