But advantages and disadvantages are currently select 1 advantage and then it generates 1 disadvantage...
This process is muddled by the fact that you typically want to select multiple advantages. Meaning that if you roll the slot machine and are intending to get, say advantages in MOOSEX and JOY SKILLS, but it generates a disadvantage in JOY SKILLS on your first pass when you select MOOSEX, you might have to contact GM's about it to get them to reroll that for you. Because it might be counter to your stripper assassin's concept to be terrible at JOY SKILLS.
This proposal would be to change the system so that you are locked into a menu, ala assign UE, or certain terminals, until you are done generating advantages. This would allow for you to select all of your advantages in one go, and then have it generate the mass of disadvantages all at once. Preventing the above situation.