Alright, out of 20 people the results so far shake out as thus:
Big new world 17
Dorms/Roommates 17
Bunk/Loft Beds 16
Bands with new instruments 15
Pool Table 14
Majors tie into existing careers across all packs 13
Online classes 13
Follow sims to class/labs 12
Pottery or new hobby/skill 12
Added school activities for children and teens 10
New rabbit hole/work from home careers 10
Build and customize your own schools 9
Ping Pong 9
Active teaching career 8
Photo Booth 8
Murphy Bed 8
Laptops 8
Fraternities and sororities 7
More take out options 7
Arcade or other new lot type 6
Football or other playable sport 6
More than one type of university to choose from 6
Events like city festivals spawning in the quad 6
Keg party or other event type 4
Other new object 4
Mind altering harvestables 4
Rabbit hole activities like cheerleading 2