Since I appreciate seeing someone else's schedule, figured I would post ours. I have 6 and 8yo. and we live quite close to school.

  10.5 - sleep
  0.75 - morning routine (teeth, dress, find lost things)
  7    - school 
  0.5  - transit
  2.75 - free time
  0.5  - dinner
  0.5  - evening routine (pjs,teeth, don't take bath every day)
  0.5  - workbooks & parent tutoring or school homework
  0.5  - independent reading of chapter books
  0.5  - stories read to them

By time they get to workbooks, they are quite tired. But they are used to being tutored in small doses so they get through it. At this point, all structured activities outside of school are on the weekend (e.g. girl scouts, soccer). Also, ideally they would go to bed 1/2 hr earlier.

Because we personally tutor our kids, I'm sure we will resent an increased homework burden as they get older, especially as we are able to tutor to a relatively high level for most subjects. Unfortunately the school does not coordinate with us on the learning objectives, so we more or less rely on Common Core standards to know what's expected.