Can we talk about the entry points and how they're not at a convenient height for adults or kids? They're at a convenient height for 12 year olds and that's about it.
We see backups at Fastpass+ scanning at high capacity attractions all the time. Big Thunder Mountain Railroad, Kilimanjaro Safaris, and Expedition Everest are issues on a daily basis. Guests don't use both sides at the entry gates of the park with regularity, nor do they use them at Fastpass+. One of the main reasons is space. My suggestion, widen the space between the two posts, and put two Mickey faces on each post, one at kid height and one at adult height. The other option is to take advantage of the long range RFID readers that would make it so you don't actually have to scan them and are only stopped if there's an issue. The latter would truly be more efficient.