Fast Jet Wannabe:
The reason there is only ever one gate agent at the gate is most likely because Ryanair only pay for one Servisair Passenger Handeling Agent. It is the same at Manchester. No doubt ground star can spare more staff because they have nothing else to do.
The agents can often not give information on delays because Ryanair very rarely give Servisair the information. It is not unknown for FR flights to arrive at the gate without so much as a word from their Ops. Very often we have to get inbound details from the crew and the aircaft registration from the side of the fueslage when it arrives on stand!
I have no doubt that Servisair agents would wear FR uniforms *IF* FR paid for them. Servisair do this for Airtours, JMC, Britannia and SIA and used to for Sabena, Swissair etc.
As has been said before, Ryanair get what they pay for. Which isn't much.