It's ridiculous. A train to Montreal backs way up into Union, way beyond the capacity of the "gate area" (trains do not need a gate area).
So you have this crowded room full of people queued up single file for one train, and if there are others going soon before or after, everyone's all getting mixed up and shouting, becoming confused. It's ludicrous.
Trains are great because they can load and offload large numbers of people in very short timeframes. Unless you do it the VIA way. And it's not like it's the only thing that sucks and is weird at VIA so maybe they should go for some easy wins.