Quick answer: Each role uses the tracker differently. Saved views per persona (engineer, designer, QA, producer) speed up the daily workflow.
Default views serve no one. Persona views serve everyone.
Engineer: assigned to me, severity-sorted
The fix list. Direct; actionable.
QA: triage queue, recency-sorted
Stuff to triage. Triager works through.
Producer: this-release, status-grouped
Release burndown. Decision support.
Designer: by area, with impact
Designer's area; impact-prioritized. Surfaces gameplay bugs.
“Saved views are workflow. Each role's workflow has different needs.”
If your team uses the same default view, the persona views are quick wins. One-time setup; permanent value.