First off all deep respect for what you achieved with level 2. I worked with it now 1 week and printed the manual as this program diserves it. However there is always a "but".
Several before me mentioned it, and I have read the answers. Boarding time is indeed very long. An A321 takes nearly 40 minutes, which is even not reality. Very seldem a group is coming out of the bus of 10 to 15 passengers and thats speeding up boarding. Would it be possible to make it adustable for the users to get more of these groups and how many passengers board in 5 minutes. Than the boarding could be done in 5 to 10 minutes for 100 to 150 passengers. Every user could adjust this depending what his hardware can manage. By the way, I do not mind too much if passengers are running through eachother.
It is absolute great fun to see these different characters walking and boarding, but when you want to depart it starts to be lightly annoying that it takes so long.
Looking forward to your reaction.