I really have to weigh in on this thread. My routine for downloading podcasts has gone from acceptable to completely unusable.
When i view a podcast in list view, it will show me if I have not downloaded any of the podcasts (used to be an arrow, now it is a cloud symbol). Occasionally podcasts would screw up and change an entry. To avoid haveing the indication that i need to download episodes, but still avoid needing to download the duplicates, i just delete the duplicates and move on. This is now completely broken in the new itunes. I now do not know what podcasts have new episodes, or just duplicates that i can ignore.
I also want to delete some of the podcasts older episodes once I am done with them. Again, it is now difficult to know which podcasts I have deleted and wich ones are new!
Do Apple employee's monitor these forums, if so I sincerely hope they see this thread and do something about iTunes, cause I have purchased my first android device last week and although I enjoy the apple eco-system, the recent bricking of my apple tv, and now the huge inconvenince with itunes, I am seriously concidering swapping my iphone 5 for a nexus 4!
Please Apple, SAVE MY ITUNES!