/signed
This is a logical approach to address the relative uselessness of certain weapon types compared to others.
Note, exotic weapons should be superior to normal weapons as they require an extra feat to use. This is an important part of balance also (reflecting increased power for increased investment). The same should follow from simple to martial weapons which also are restricted, but in a less severe manner (so likewise the difference should be lesser).
I am not commenting upon the specific suggestions for fixes here and more on the general idea and my support for it.