I think the reason why you got waitlisted at UCDavis is because they don’t want to accept people who have over the top GPA’s that are obviously going to go to other schools and only want to apply there as a safety.
Your stats are really competitive man. I can say with 90% certainty you’ll get into UCI, or atleast from what I can see. 4.5 GPA is insane!
Good luck, I’m keeping my fingers crossed for this week too.