They still use the water for bathing, washing dishes, washing their clothes, watering their lawn, washing their car and anything else you can think of. I've got over a dozen properties in Flint and I can tell you the pipes are getting replaced rather quickly.
Anyways, I can say that the lead is only part of the problem, if it is a problem at all. The city is passing out water filters, free water and other services to make sure people do not have to drink contaminated water. The main problem with the water liens is that the price of the services went up a couple of years ago. My understanding is that Flint has some of the highest water rates. You raise the price, then you'll get a higher rate of non-payment as well. I think that is the biggest factor with the water liens.
In regards to fixing the water, they have to go house to house. And not all houses have problems. You might have a street with 20 homes and 5 need the pipes changed. Then you go over a street and and 15 out of 20 need changing. The crews do not know which houses need the fixes until the water is tested from the tap.
However, it is getting fixed. I hear from some that it is chugging along rather quickly and others tell me it's slow. I don't know myself.