My two pennies:
Options 1 and 2 are what I would do. Both of them... purchase the rewards, all 3 of them have earned them already :) And then play the UNI, hopefully while you still play uni, the NPC issue is fixed.
Option 3 ... naah, you have done that so many times, give yourself a break :p
Option 4 ... one option, some fresh new save , challenge or something.. or you have that ancestral save too.
Option 5 , Out of the question. Nope. No. Pretty clear these are the sims you enjoy playing the most with. So... no.
Option 6 , I would do this one too, anyway :D