Don’t miss the Workfront AMA: System Smarts & Strategic Starts! Ask your questions about keeping Workfront running smoothly, planning enhancements, reporting, or adoption, and get practical insights from Adobe experts.
Yeah this is one of the QoL things that you don't notice until someone points it out, especially as the SysAdmin. It's literally the first thing I do when opening a project: hit the collapse button. This lets me open only what I need to deal with and focus on it.
I see both sides, many may want it to default all-open like it does now. So make it a user preference. Also make it a global-settable default when most people want it that way (over-ridable by a personal default, of course).