Terminal 2 is a good facility but as Müller pointed out in an investor day call, it's lacking simple touches to enhance the ease of use for the airlines and hence passengers. Just a case of Irish lack of attention to detail I think (I'm Irish so pease don't jump down my throat for that comment).
Missing:-
1. Lead in lighting for stands meaning a marshaller is always required.
2. Baggage has to be manually transferred from one belt to another in the US Preclearance area when a belt could've been installed to do this.
3. Pier E was piped for fuel distribution but never connected to the fuel farm meaning tankers driving round the airport loading the fuel instead of simple pumping / metering trucks as used at alot of other major airports.
4. The short term car park was built with just two lifts and there is a queue outside just about every time I have used the car park. Can't imagine this situation will improve much when traffic picks up properly.