Introducing new minimum bar width tag which will globaly limit some minimum bar width no matter how many notes are inside that bar. The note spacing in that case will be more compact and there will be no big variations in bar widths. There is some progress already with proportional rendering on this topic which is similar but this feature is much easier to implement than proportional rendering and it helps a lot with look of the score.
Please see attached PDF for better understanding.
Anonymous
Really complex to implement. The spacing algorithm is based on springs and rods and takes account of the measure content : each element has a specifi force attached to its spring. That requires probably to design another spacing algorithm.