Optimize Ruckus Configuration
I came across a good support forum post (link below) that goes over some CLI configuration changes to optimize your Ruckus setup. Personally, I enabled ofdm-only and changed the bss-minrate and have seen better roaming behavior:
- SSH into your ZoneDirector
 - Verify your current WLAN settings with 
show wlan name "wlan name" - Enter enable mode with 
enable - Enter config mode with 
config - Enter WLAN configuration wtih 
wlan "wlan name" - Disable legacy 11b clients with 
ofdm-only - Change the bss-minrate with 
bss-minrate 12.0 - Then 
exitand the changes are saved 
If you have dense enough AP coverage, you can use bss-minrate 24.0
Update: With the release of ZoneDirector 10.0 software, these settings are now configurable from the GUI under the Advanced WLAN settings.