Another issue is where put turnstyles and tollbooths at the monorail station. that area is already very tight since you have the submarine attraction in the same spot.
The easiest thing would be to split the queues and load guests depending on what monorail arrives at the station.
Lets say for example the tomorrowland station.
at one point the queue would split into two. At that point tickets are scanned to varify what queue you are directed to once reavhing the platform.
Castmembers would then hold guests in the queues and allow guests with one kind of media to fill in the holding pens depending one what monorail is due to arrive next.
There are actually several ways to make the system work. The issue is money