I'd suggest we rename this to "Upgrading from 1.x.y to 1.a.b".  This is more in line with the lower section title of upgrading from 0.90.x to 1.x.y.    Another approach would be to have a procedure for rolling upgrade and a procedure for full cluster restart procedure.  Then have some introductory section that tells people what to do in a table.  e.g. from 0.90.x to 1.x.y, use full cluster restart.