How is that any different from the "YOU MUST SAVE THIS DUDE/DUDETTE BEFORE THE FOG COMES TO INABA!?" They're both arbitrary time-limits. P3's just sets a hard limit and if you fail to get strong by that time, well you're fucked. P4 weakened that aspect by letting you redo a week.
it's actualy no different at all,as i said many times i don't really like both persona games which is why i don't give a fuck if they do persona 5 or not,i was super excited when i heard about persona 3 (all the japan impressions made me hot too) but the final result left me grumpy like the grinch
now if they did another game like nocturne that would be awesome...