For my kitty, it has the advantage that I can simply sprinkle it on her food. When I first got her diagnosis, I had the tea, and knew of its healing properties. I called the lady and she said that people were getting excellent results with their pets. I then reasoned that I could dose it by portions. I hope this helps.
Nothing is said about E-Tea being frozen or freeze dried.
Freezing damages essiac tea. While the cost of essiac capsules is outrageous, I agree the convenience is attractive. Convenience is not always the best rationale for taking herbs this way though. In the case of taking capsules, one is bypassing this crucial step. Relying on stomach acids, digestive juices and an adequate intake of water in helping to break down the capsule and assimilate the contents can result in a slower-acting and less potent preparation.