Hi,
For my understanding, this are 2 entirely different things -- access to WLAN and access to printers or shares.
What you see in Ruckus logs, is authentication, which is going through ruckus proxy to Radius, which efficiently just checks if user exists in AD and is entitled to access WLAN. When this is checked, user is connected to network and farther communication with AD goes through network ( to access printer or share), not through Ruckus Radius proxy. Another communication through RADIUS happens only when reauthentication time comes and anyway it has nothing to do with Windows share access.
So you have to look on domain controller logs and PC logs, not on SZ logs. Problems with communication with AD may be related to some limitations (filtering, routing, packet loss and so on), or specific WLAN settings. So for starters, check that if you can access domain controller when have problems with printing...
Probably your network setup changed in comparison with what you had with stand-alone Cisco APs, look there...
Hope it helps...