Congrats on the new bike! I'm in the same boat as you as far as being short. I'm just under 5'5 and on top of that I have a short inseam. I too have installed the kouba links, and adjusted the bike accordingly.
You mentioned the low seat. I purchased the low seat and found the difference between the two to be almost unnoticeable. What did end up making the difference for me was taking off the 4 rubber blocks on the underside of the seat. I've read some people have cut them in half instead, but I opted to just take them off completely and replaced them with a couple of felt pads. When not sitting on the bike, the seat moves around a little bit, but once I get up on it, I can tell no difference, except my feet are finally in a place where I can actually back the bike up when I need. Just something else there for you to consider.
Also, what side stand did you get? I still have the stand the bike came with it, but I'm just not happy with the stability of the bike on it. I've looked at having the stand shorted, but am curious to see what other decent options are out there.
Congrats and thanks!