Might be clearer if you say "update a scale up via change" here, just cause "change" is a verb and a noun.  :(  stupid english.  This is right, it just took me a second to parse.

Later it says "Update the desired capacity scale down policy > ... "  --> perhaps "Update the desired capacity to scale up by setting desired capacity > maxentities"?  Not sure if this is clearer.  :)