I would like to see more levels to the bank.
A: Even with a Plus Account, it is too easy to hit the limit on the bank. My opinion is that you shouldn't hit limits if you log in at least once a day. In Era 5, it doesn't seem difficult to sustain revenue of 3 to 4 million dollars/hr, which fills the bank in less than 24 hours, especially since one does not normally want to drive the account balance all the way to zero every time one logs off.
B: The bank is the odd man out, restaurant, shopping center, and hotel all have 32 levels, why not the bank ?
I suggest at least 2 more levels, with $5 million increments without a plus account ($10 million with a plus accoun), giving limits of $35 million ($70million) and $40 million ($80 million). The major impact on the game would be that you get to sleep (or shop, or work, or visit friends) a little longer.
What do you think ?