A driver told me that the U6 was going to be extended to the Bus Station in April. That would be cool and as you said would make sense operationally because drivers change over at the bus station.The issue with both the U2 & the U6 is how they run operationally. The U2, whilst not serving the central area, has its vehicles park at the bus station to undergo driver changes, as doing this at the uni or the depot is less practical. The U5 & U6 meanwhile interwork with one another as one PVR, again for the purpose of doing changeovers at the bus station.
Wasn't there also some rumour that the U6 was going to be extended to the bus station to give the 5 some relief along Lower Bristol Road? Or am I making that up?