Most of the soloing bst are well.. soloCities are largely underwhelming compared to COP, If they made it so there were JA areas magic areas and ws areas in the cities more people would do them, since engaging a monster you cant stagger is a waste of time in dynamis... so if 2/3 of your pulls have monsters you cant stagger you wasted 80 of your dynamis... more if that smn kills you... So changing the monster distribution would increase the amount of people in cities compared to CoP. The cities didn't have a need to change when CoP was a glass still, but now that there are easier and more profitable zones, you'll find people soloing in those zones... If they're just after gil they'd crowd sandy but if you're on a blu at a magic camp you wouldn't mind it...
Just a thought, I just think you should clear the complaints about zilart dynamis to remedy the congestion of CoP zones, I know for a fact if i could have a camp of magic or ja staggers in a zilart zone i'd farm them for upgrades not CoP...