Your right re BUS Gate - its not traffic light controlled though so not sure about the transponders theory or perhaps they are future proofing? I say the #3/403 bus may use the turning facility until then? Even though once the junction is traffic light controlled - should make it easier for a bus driver to cross both yellow boxes. Anyhow based on changes made to the recent Briarhill junction from the original plans not 100% sure will the Morris be done exactly to these plans anyhow as shown in the link http://www.galwaycity.ie/GeneralNews/180711_02.pdf
On the other hand, regardless of how the bus gate is operated there are two right turns off the ballybane road (to Mervue and to the Monivea Rd). I can see that being a bit of a mess.