One of the things that stood out to me about my ideal vision for the fighter is that not only is a fighter the best at fighting with a great array of weapons, he/she is also the best at improvising weapons. For me, no character is truly a fighter if she cannot improvise weapons better than anyone else. This is something that I think is lacking in the existing fighter. To remedy this, I suggest we give fighters the following feature.
Master of Improv.: When the fighter uses an improvised weapon, instead of using the stats for an improvised weapon, the fighter is able to treat the improvised weapon as the weapon that it most closely represents. For example, a fighter can pick up a bent iron bar and use it as if it were a boomerang. He can tie a dagger to the end of a broom, or simply sharpen the end of a wooden staff, and use it like a spear.
There are a great many problems that can be circumvented by players and DMs having a mature discussion about what the game is going to be like before they ever sit down together to play.
The answer really does lie in more options, not in confining and segregating certain options.
You really shouldn't speak for others. You can't hear what someone else is saying when you try to put your words in their mouth.