I'm going to ask for the same thing I asked for (but did not get) in EII: to be able to use the shift key on the right of the keyboard instead of the left. I game left-handed, and it's a pain to have to use the left shift key with my right hand. I know this isn't a big problem, but it's still a pain and it should be trivial to add in right shift key functionality.
Frankly, when I first started Eschalon I was shocked that both shift keys did not perform the same function. I thought my keyboard was broken for a while because the right shift key wouldn't work!