As someone who has just recently IMO gotten better levels. I think to improve your level making the best you should make and play alot of different levels. This allowed me to upgrade my knowledge of what people like. You can go to my favorites collection if you want some help. They helped me and they may help you.
Reducing the number of winning paths was an improvement for sure. For your next level I would try to introduce some more path options to try and make it less obvious / trick the player into taking the wrong path.