Some things to keep in mind:
You need to each drink about 4 cocktails a day at full price to break even. If you have wine, glasses are marginally cheaper than cocktails, but the packages do not include upgraded wines.
There are daily 2 4 1 happy hours in the lounges daily from 5 to 6 pm.
There is usually a Captain's reception during which drinks are free.
We go through the calculations and find for us that our bar bill is typically cheaper than the packages.
Convenience of the packages is one thing folks like, but that is not important to u.
So our experience may not represent yours, but I offer it for thought.