For the record, "Rear Sets" and "Lowering links" are two completely different things!!!
Rear sets relocate your foot pegs, while lowering links shorten the rear suspension linkage, lowering the bike.
Raising the rear/lowering the front both effectively decrease both rake and trail, decreasing the stability of the bike. Trail functions similar to caster in car suspension in that greater trail means greater directional stability, but slower turn in.
For street riding, where you spend a greater proportion of your time going straight, this is undesireable. You want stability to keep the bike pointing where you would like to go. On the track, where you spend a greater proportion of time turning, you'd rather have less trail (stability) and less rake (faster turn in).
With my suspension set up for the track, I can barely touch the ground with both feet, Just tip toes.
I said all of this to make a simple point, Don't go screwing with your suspension just so you can put your feet flat on the ground. Your toes are plenty. Poorly set up suspension can be far more dangerous (high speed crash) than not being able to get your feet flat on the ground (low speed tipover).