One reason for having the two legs in front versus one is for tipping. The saw is more stable with two legs in front. If you had one in front, there would be more chance for it to tip as you pushed on the work piece or the saw.
I looked at my saw and stand and found that I would have to sit very close to it for my legs to hit on the stand. I have a 3/4" shim under the back single leg to tip the saw slightly forward. I have read many comments about others doing a similar thing. With it tipped forward, there is even less chance that someone's legs would hit the stand.
While this may be an interesting discussion, the three legged Hegner stand has worked well for many people for more than 20 years.
Of course, anyone with a Hegner is free to mount their saw backwards if it makes it better for them.