A wrist rest properly used will not solve anything. One should not rest your wrists in the wrist rest while typing. This has been linked to being a significant contributor to carpal tunnel. Your wrists should not be touching anything while actually typing.
Being to tall will depend on many factors, mostly being height of desk, height of chair, and your own body size and posture while typing. Ideally, your wrists should be straight with your firearms when typing, not ripped up or dipped down.. The reason those old beam springs had such steel angles, is becaue the desktop was relatively very high compared to the chair.