Slurs over a system break

A question for the engraving experts: The default positioning of slurs over a system break is sometimes not very nice, because the slurs collide with the staves (e.g. page 2 in the attached file). I do not see a pattern, when a position of the slur is ok and when it is not. Does someone have an idea to get a better default placement of the slurs? Manual corrections of the slur-positioning within 2 pages is ok, but sometimes I have a few more pages...