I had also problemen with wireless on omega 2+
I changed mij "etc/config/wireless" file to: (copy from other omega 2 thats working fine)
config wifi-device 'ra0'
option type 'ralink'
option mode '9'
option channel 'auto'
option txpower '100'
option ht '40'
option country 'US'
option disabled '0'
config wifi-iface
option device 'ra0'
option network 'wlan'
option mode 'ap'
option encryption 'psk2'
option ssid 'Onion-XXXX'
option key 'onioneer'
option ApCliEnable '1'
option ApCliSsid 'own-SSID'
option ApCliEncrypType 'AES'
option ApCliPassWord 'own-KEY'
option ApCliAuthMode 'WPA2PSK'
config wifi-config
option encryption 'WPA2PSK'
option ssid 'own-SSID'
option key 'own-KEY'
and reconnect with "wifi"
-sometimes wifisetup makes a mash of this file.