Back in the day this may have been an issue if you were racing, but today we are driving pampered show cars so racing is not necessarily on the list anymore as far as shifter play is concerned (don't want to risk a blown drive train component).
I still have the original Muncie shifter and I found that as long as it is adjusted correctly and the rod unions are not worm out, it does shift good, though not as firm as a Hurst.
IMO I would stay with the original shifter unless it has major wear.
Mike