Size and location look appropriate to me. I get that folks on Flyertalk are always kvetching that things ought to be better value, more convenient, and "more everything," but for those of us on our first go-around, who don't spot the one button with an English label from a dozen items on the screen, I think human help is probably a better plan than re-arranging the interface.
Fortunately, staff at larger stations are usually ready to step in when they see someone looking confused. At smaller stations, you may need to ask for help at the window. At unmanned stations ... get on a train to a larger station.