I am currently doing all zone 2 on the trainer and rides on my own. Interestingly enough, zone 2 is not super easy, and like someone else mentioned, I started off not enjoying my rides. That is changing. I feel fresh before, during and after riding. To answer if I am still doing those hard rides the answer is yes, because I love them, and I to note I am at the front at any point in time I want to be, which is different than previously. I consider this my 20% hard riding.
I am seeing results with training in zone 2.....I enjoy riding fast and hard much more......but I am training to race....and who better to guide me on how to train than a former pro.