Saeviomagy
Adventurer
I think the problem isn't so much that EWP is cheap, it's that martial weapon proficiency in a single weapon is too expensive. Basically the only people with martial weapon proficiency are going to be fighters - everyone else will tend to
a) Pick the simple weapon which works best, for a typically minor disadvantage in terms of damage and the like
b) get an EWP
And if you eliminate option b, then I think everyone will just stick with option a.
So - a good idea would be to juice up martial weapon proficiency in some way (say by allowing a small selection of weapons instead of just one). 2 would be a nice number - most people would take it and pick up (say) a decent melee weapon and one of the bows. Others might go for a medium and a light melee weapon. Now it's a feat worth taking. Simple weapon proficiency is still worthwhile, taking a level in a warrior class is still worthwhile, taking EWP is also still worthwhile. But now MWP is a worthwhile feat.
a) Pick the simple weapon which works best, for a typically minor disadvantage in terms of damage and the like
b) get an EWP
And if you eliminate option b, then I think everyone will just stick with option a.
So - a good idea would be to juice up martial weapon proficiency in some way (say by allowing a small selection of weapons instead of just one). 2 would be a nice number - most people would take it and pick up (say) a decent melee weapon and one of the bows. Others might go for a medium and a light melee weapon. Now it's a feat worth taking. Simple weapon proficiency is still worthwhile, taking a level in a warrior class is still worthwhile, taking EWP is also still worthwhile. But now MWP is a worthwhile feat.