I would be fine with keeping the cup and cone bottom bracket. But the cranks that are on there are road doubles with 42t small rings. Way too hard to get up some hills, especially with a backpack or groceries.
I'd really like a casette as opposed to a freewheel. Less likely to bend the rear axle, but mainly I want to have more gearing options. I've swapped from the 5 cog freewheel to a 7 cog freewheel but still... all of the freewheels I've ever come across have the same big and small cogs.. just a few more or less in the middle.