As a non premium pax who has only flown domestic through T5 (so far) I have to point out that the information given out on the public screens is also lacking and sometimes late.
Both times I've flown through T5 in the past year, the gate information for my flight has only gone up at the last possible moment (or so it seems). Luckily both times it was on the main concourse and I didn't have a panic getting to the satellite gates. Luckily I'd also asked at the customer service desk and had an idea about where it was likely to be going from.
After reading this thread I'm not looking forward to my transit from my NCL flight to my LAX flight in April...