The legislative changes do not create any new rights for employees. If an employee is required to have a company cell phone, then they cannot reject it based on the disconnecting from work requirement.
Please note that any term that is included in an employer's policy, if it is a greater right or benefit than minimum ESA entitlements, will likely be interpreted by the Labour Board as a statutory right, and enforceable as a statutory right. (s.5(2) of the ESA)