There seems to be a lot of over reaction to this information.
I remember reading 2 or 3 seasons ago, there were something like 53 elements that go into a players SC score. Obviously, we were only given information on the simpler ones: Kicks, marks, hballs etc.
Apart from the Ruck changes last season, nothing has changed. Some interpretations may have been tweaked, but the nuts and bolts haven't changed.
There were no radical differences to explain the Rance/McDonald scores last season. They were scored under the same system as 2014 (apart from any hitouts they might have recorded). I repeat, the only changes, apart from the Ruck changes in 2015, might be some interpretive tweaks.
Cool your jets people, now is not the time to panic, and go looking into this stat, or that stat, to change your team!