Since you asked for advice aside from "better players"...
If you move 3B up to decrease the angle, she better be fearless, and have lightning reflexes.
You could try moving 3b back to give her more time to get to the ball. The downside is she will likely get bunted on, over and over, until you move her back up.
You can also cheat the shortstop to the hole by having her read the pitch and location from the catcher.... she has to be inconspicuous about shifting over though, or the batter will read her move and expect an inside pitch.
You can also try pitching outside more to RH hitters. This will lead to more hits going between 1b and 2b, but at least it's a shorter and easier throw compared to the SS deep in the hole.
And if the problem continues... get better players!

Ladies, if a man tells you he will fix it, he will fix it. There is no reason to remind him about it every six months.