I used to be 5'4", now I'm 5'3" 28" inseam, 130#. I'm used to being on my toes at a stop. The last 3 street bikes prior to my MG Norge I've had to do some sort of bar backs. The Norge got their lower gel seat. The real test is a test ride. Cycle ergo puts me on my toes on the Scrambler. I had an old school shoe repair shop add a second set of soles to my Aerostich Combat Lights, so that's not taken into account. A lower seat is not always the answer as it cramps up the legs. I also put Gold Wing pegs on my Norge for an extra 1-1/2" ( maybe only 3/4", I don't remember, whatever it was it helped on long distances) of leg room after the lower seat. All of this leads to no pre-order for me. 5'8"-5'10" would be a good height for most motorcycles I'd guess. I have a buddy I used to race MX with who has a 26" inseam, it's one toe for him on whatever he rides. He likes the looks of the Scrambler too. Time will tell.
Stay safe, John