Both the "space systems evenly" at page layout tool, and the "space systems..." plugin aren't that great. The biggest problem is that when spacing systems, it doesn't take in considerations anything, slurs, hairpins, expressions, articulations etc. other than the systems position. So it can easily be so that stuff collides when using these tools, or that it doesn't look that well spaced, because of not considering other stuff other than the systems themselves. Would be better if when spacing it took into consideration all the other stuff, so that it spaced well. And would also be good we a preset when it comes to space at the top and at the bottom. That way you could easily space your systems very well. Rather than of now, when it becomes better by just dragging the systems manually.