This is going to sound horrible and I can't believe I'm even typing this, but the solution is to shrink or eliminate Frontierland's main drag and push in that direction to create a wider walkway. Redesign Adventureland *and* Frontierland. They have so much space in there, at least for Disneyland. Think something along the lines of The Magic Kingdom where you walk in one side of the bathrooms corridor and emerge out the other side in another land. Sure, Disneyland has that at the entrance of Adventureland and it's mega charming, but it's awkward and cramped because it's Disneyland. You'd be losing shops and potentially the Diamond Horseshoe, which nowadays is only an air-conditioned building for APs to hang out and charge their smart phones in between vlogs.