Remember that the report that smartthings gives us is not a true zwave routing report. It’s just one specific route recorded in the cloud at one point in time. It doesn’t tell you the most common route, or the route it will take next time. And it’s not real time.
Zwave is fine, and it did become very popular particularly for professional installers. ADT’s home automation offering, Xfinity security’s home automation offering, Vivint, all have many more customers than smartthings hub customers, and all are based on Z wave.
SmartThings is a multi protocol platform and has laid its own application layer over the top, which can be frustrating sometimes. It gives you more options and more flexibility, but sometimes it feels like some of the base functionality has been hidden away. For example, I don’t know why they don’t give us a full zwave routing table. Most Z wave hubs do. 
FAQ: Is there a way to see the Zwave mesh network map?
Anyway, it can take up to 24 hours before you really see a difference in routing, so the best thing is to be patient and see if you get improvements in status reporting tomorrow.
Submitted with respect.