I think the MS4 are still light - the uppers are where the weight comes out - for instance, the tongue is quite light though its mesh weave still apears tough - and the leather of the uppers is of a lighter grade than I've had before. And the whole lace area is quite wide allowing for very good ventialtion. In these ways the weight is reduced.
I think the sole rides quite high, with an upright stance, and sharp non-roll corners. (Of course if you do roll over these corners you will really go over.) So, no this one is not low to the ground.
I believe there is a trend in more recent shoes to jack up the heel a little in order to have you on the balls of your feet. I cannot prove this, but I believe it is the case. I do believe it a good thing to be aided in your footwork in this way.
The shoe has side panels that allow a lot of flexibility and I think these are fantastic shoes.
Note - I did not buy them because they were cheap, though that helped. I bought them for stability's sake as I am a long-term ankle roller and the MS4 are an anti-roll cage!