Each of the Silent Realms have a variegated amount of difficulty to them. Although the goal was the same every time, the terrain offered assorted challenges that tested our promptness and sense of judgment. We had to gather all the Light Tears in about a minute and thirty seconds, and at times they were very cleverly hidden and out of the way of the other Tears. There were a few things that allowed us to track down Tears quickly (the Light Fruit specifically, which triggered a temporary beacon above the Tears' locations). Unfortunately we couldn't use items to reach the luminous objects, such as implementing the Beetle to scout out the areas, because they would have made the search way easier. I think they would have been useful in these alternate worlds set up by the goddess Hylia.
In addition to all this, tons of obstacles were strewn across the Realms as well. Watchers patrolled the designated areas, and Link had to be careful to avoid them or else, when fully bathed in their late, they would awaken the their earthbound brethren. It's hard to describe the sensation that comes over me when a Guardian comes to life. It's as if I knew that I had to avoid them at all costs, not only for fear of failing the trial and having to restart, but fear of my life. Running out of time or accidentally stepping into Waking Water also set them off. In short, collecting Tears is essential to getting out of there...ASAP.
Compared to TP's Twilight areas the Silent Realms were indeed a challenge, and possibly one of the most challenging sequences in the Zelda universe. They gave off a sense of urgency that many Zelda fans seem to crave. Perhaps something similar should be in order, only with different objectives each time. Thing is, collecting the titular Tears in any game can get old after awhile, but I agree that urgency could be crucial to a good game experience. Just like the Silent Realms managed.