Whats this about forcing passengers to go up 2 floors up and 2 floors down?
On departure, it's 2 floors up and one floor down. Although US-bound passengers have to go up 2 floors and down 2 to get through pre-clearance.
Arrivals are a bit more straightforward.
My main issue with Terminal 2 (and with Dublin Airport in general) is that the signage is apalling. I spent 20 minutes trying to find a shuttle bus a few weeks ago and I while I use Cork more than Dublin, I've still been a passenger into or out of Dublin over 10 times this year.