TSL has the problem that many of the new 'mini-lands' have (including Potter and Rat and maybe all the portal lands of EU), which is this:
You create a narrow 'alley' for guests to get to popular rides that have a capacity of more than 2,000 people per hour. So, you have more than 2,000 people per hour constantly going in and out of that narrow mini-land.
Potter lands, Rat, and TSL always feel too crowded to me because of this.
The narrowness of the lands come about from lack of space, OR, to avoid sight-line issues. I'd gladly exchange a bad sight-line for the ability to be comfortable in one of these new mini-lands and be able to hang out in them.