Wouldn't the easiest way to solve the issue would be divide a bar into 4 rather than 2 ?
Is there any reason it has to remain with 2 ?
Is typing "," and both chords the best way ?
Do I have to retype a long chord on beat 1 to change chord on beat 2 ?
Do any other software have the same chord entry method ?
Would it screw everything else up changing it to 4 beats causing other things to no longer work ?

OR would this be an easy way to solve many issues like being able to preview each chord easily (Shift+Enter) ?
allow selection by bar or beat in the chord sheet ?

If it moves to RealTimeSignatures eventually wouldn't you need this method ?

Maybe have this as setting that can by chosen by the user for their preferred method ?

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