Weapon Focus Short Sword

[Ouroboros]

I am considering adding weapon focus short sword for a dual wielding character. I usually never do this, for I like the flexibility of being open to use the best light weapons I find. But getting his attack bonus up by focusing on a single weapon type that I can use in both hands is an idea. I probably will not do this, for it limits me so much. But if there are plenty of short swords better than +4 to use down the road, it is worth considering. Any thoughts? My inner voice still says no, remain open to multiple weapons.