Set BoxEdit 'size' behaviour in R7 back to the R6 way?

Example:
R6: Ellipse Size: 20X 10Y. BoxEdit ‘size’ uniform by X to 15 leads to 7.5Y
R7: Ellipse Size: 20X 10Y. BoxEdit ‘size’ uniform by X to 15 leads to 5Y

R7 now changes every value the same amount if uniform is selected instead of scaling the other values proportional.

Is there a way to get the R6 behaviour back or do we have ‘to deal with it’?
or … am i simply blind and there is a absolute/relative switch somewhere that i simply refuse to notice?