I would like to 2nd the request for this issue to be re-looked at. When loading up my flight at Heathrow, it takes a full 15 minutes for planes to push back, taxi and start getting to the runway for take off. Also, it takes a while before any planes land. This might be fine if you've got your head down programming your FMC or MCDU, but if you're flying GA or doing a bit of spotting, it's quite boring waiting for things to come alive.
What I would like to see is that as soon as you load into the game, there should be planes landing and lining up for take off, based on the schedule. I want to see a busy and active airport immediately once it loads up. I don't know if it's like this due to a restriction in the way the core game works, but if not, then please consider making this change.