I agree with the recommendation to use more tea. I had brewed the tea "concentrate" by making it in my Mr. Coffee iced tea pot without adding ice or water to dilute it. I still used 24 ounces of it for taste balance. I also froze some of the punch in ice cube trays to keep the punch cold for the party. That said, the punch received rave reviews from both the people at my party and the leftovers I brought to work. 2 gallons is a lot of punch unless you have a crowd.
It tasted more like a fruity lemonade than a tea. My guests nearly finished it all. For my taste though, I would put another pint of tea in the mix. Still quite good.