Here's the thing about this lottery system: It's okay for passholders like me (Even though I currently have the cheapest pass). If I don't get to go on, I can just do Space Mountain or Indy, leave, and then go to Knott's.
I can come back another time for a chance to ride. What really sucks are the people who may have payed a one-day ticket to go see this new ride that's advertised as open, do everything right to get a boarding pass, end up in a backup boarding group, and they don't get to ride. I know a few people who don't even have a smartphone, so if they want to ride it anytime soon, they're screwed. There's no way they can ride until they retire this process.
There are also several people I know who want to go see it, but are not well-versed in the theme park scene or they can't afford a pass or commit to the time to do so. Sucks for them if they see the "NOW OPEN!" billboards, totally oblivious to the whole process, and find out after shelling out the cash to enter that they can't ride. You can argue that they should've done some more research before spending money to see it, but there are a good chunk of people that can only do one day. A lot of those people will just assume that they will have to show up early to get in line to ride....you know, the old-fashioned way.
My point is there has to be some cushion for the GP. Maybe have it to where only the guaranteed groups will be given to the people who showed up and are inside at 8 and then save the last ones/backup for the stragglers. At least have a stand-by system or something. It's a bit unfair to oblivious guests or people who don't have a smart phone.