- Introduced the alpha `MutableSchedulingDirectivesForSuspendedJobs` feature gate (disabled by default), which allows mutating a Job's scheduling directives while the Job is suspended. 
  It also updates the Job controller to clears the `status.startTime` field for suspended Jobs. ([#135104](https://github.com/kubernetes/kubernetes/pull/135104), [@mimowo](https://github.com/mimowo)) [SIG Apps and Testing]

- Node affinity, Node selectors, and tolerations are now mutable for Jobs that are suspended and have never been started ([#105479](https://github.com/kubernetes/kubernetes/pull/105479), [@ahg-g](https://github.com/ahg-g))
- Pod template annotations and labels are now mutable for Jobs that are suspended and have never been started ([#105980](https://github.com/kubernetes/kubernetes/pull/105980), [@ahg-g](https://github.com/ahg-g))

- .status.terminating field now gets tracked faster when active Pods are deleted, specifically when Job is failed, gets suspended or has too many active pods. ([#125175](https://github.com/kubernetes/kubernetes/pull/125175), [@dejanzele](https://github.com/dejanzele)) [SIG Apps and Testing]

- Performance improvements in `klog` ([#115277](https://github.com/kubernetes/kubernetes/pull/115277), [@pohly](https://github.com/pohly))
- Pod template `schedulingGates` are now mutable for Jobs that are suspended and have never been started ([#115940](https://github.com/kubernetes/kubernetes/pull/115940), [@ahg-g](https://github.com/ahg-g)) [SIG Apps]

- Fix the bug which could result in Job status updates failing with the error:
  status.startTime: Required value: startTime cannot be removed for unsuspended job
  The error could be raised after a Job is resumed, if started and suspended previously. ([#135129](https://github.com/kubernetes/kubernetes/pull/135129), [@dejanzele](https://github.com/dejanzele)) [SIG Apps and Testing]

- Fix the bug which could result in Job status updates failing with the error:
  status.startTime: Required value: startTime cannot be removed for unsuspended job
  The error could be raised after a Job is resumed, if started and suspended previously. ([#135130](https://github.com/kubernetes/kubernetes/pull/135130), [@dejanzele](https://github.com/dejanzele)) [SIG Apps and Testing]

- Fix the bug which could result in Job status updates failing with the error:
  status.startTime: Required value: startTime cannot be removed for unsuspended job
  The error could be raised after a Job is resumed, if started and suspended previously. ([#135128](https://github.com/kubernetes/kubernetes/pull/135128), [@dejanzele](https://github.com/dejanzele)) [SIG Apps and Testing]