I constantly encounter two problems when re-spacing notes with the Measure Tool beat charts:
1. I cannot use the arrow keys for exact re-positioning, since one can only select and hold with the mouse.
2. I cannot select and hold more than one square at a time, so that groups of tones cannot be re-positioned at the same time, which is laborious and inaccurate.
Of course, I can do both of these things with the Note Position Tool, but there are many cases where this is not practical.