Also the UPH is good from the time you check in, until midnight of the day you check out.
The PHP plus are good forever, if you do not use a day or even if you do not use all of your pluses they are good for your next visit.
Seems to me that unless you went to the waterparks every day (I don't know who would? But I'm sure there are some), and the parks every day, the PHP are actually a better deal.
Never been to DQ (but get discounts with DVC, I believe). Sounds like thats the direction to steer ILs...