Was there in late october with early entry, we decided to leave HP to the end of the day. Used the early entry to do mario kart then left that area for later as well. Gripe at the time was there seems to be just not quite enough rides (or food stalls) for the volume of people - especially when comparing overall wait times to the other universal parks - I know epic is obviously brand new. Went on the carousel with the youngest early when it was quite as well and later the queue was almost 100mins, not a chance I'd have stood that long for it.
Yoshi queue was big late on and whilst the youngest loved it I wasn't impressed given the wait. Only ride we didn't make it on was mine-kart madness.
Oldest (9 at the time) thought stardust racers was one of the best rides of all the parks across disney and universal.
If the kids ages allow you to stay the full day right up to closing I'd recommend.