Asirad,
Adding the sweeps around the head of the bed did fix some design flaws. There are standards as to the spacing of crib slats and I believe it is 3" on center with no more than 2" of open space between slats (its been a while since I designed baby furniture to be built). I am still questioning the bar with the hanging toys on it. It just looks too low.
Overall I really like the shape of the crib and your corrections are working while still staying true to your design. Well done.
Scott