I agree with the comments of @profmatt and @rebeecky.
For most of the attractions, your wait time with EP should be less than 10-15 mins.
However, when I was there last month, I still had some attractions where the wait time was higher.
First of all, the posted wait time at Kong was at 80 minutes in the afternoon. With EP, we ended up waiting nearly 25 minutes. I have not done Hulk (where the wait was also 80 minutes), but it’s possible that the rides with long stand-by line will also have a longer wait with EP. We waited less than 5 mins in rides such as Spider-man, Jurassic Park River Adventure or Transformers, where the stand-by wait was posted at 30 minutes.
In addition, for the two big Potter rides (Gringotts & Forbidden Journey), we ended up waiting more than what we thought.
For exemple, we RD Gringotts (without EP to see the queue) for a total experience of 23 minutes, so probably between 5 and 10 minutes of waiting time.
We did Gringotts again in the afternoon with EP (posted at 40 minutes) and we had a total experience of 38 minutes, so probably a wait between 20 and 25 minutes.
For Forbidden Journey, the first part of the queue (before arriving to the lockers) is the same for stand-by riders and for those using EP, which can be confusing at first.
Again, we did did Forbidden Journey early in the day (at 09:55, posted at 15 minutes) without EP to see the queue for a total experience of 19 minutes, so probably less than 10 minutes waiting time, walking through the castle.
We did Forbidden Journey again in the afternoon with EP (posted at 40 minutes) and we had a total experience of 33 minutes, so probably a wait of about 25 minutes.
All in all, even with crowds not that large, the EP was really worth it (we were only one day).
I agree that an comprehensive touring plan isn’t needed with EP.
However, even with EP, I would still consider hitting Gringotts/Forbidden Journey and the mose popular rides early in the morning of late in the evening to reduce your waiting time.