ORK has one jet bridge at the minute and it is rarely used. If EI were to use it for LHR flights (to begin with) on a consistent basis and were to ask for / commit to use them for other routes there would be some justification, but at the minute EI are not budging and no "full service" carrier uses the airport. If Cork had a service to the US and the likes of LH offering frequent flights to FRA a second bridge could be looked at. Im sure it could be done quite quickly, as all the provisions are there, just a case of acquiring and installing the bridge.
I've only used T2 once and thought it was a great facility, why shouldn't ireland have facilities comparable to the best in the world? T2 is every bit as good as ZRH and head and shoulders above LHR, DXB, etc.
As for the public transport nightmare. CIE have run public transport since the year dot and it took them nearly two decades to implement a common ticketing/fare across Dublin. That says it all, I think.