I think that, for some time now, an Expose-like feature became pretty much a norm and many people simply expect some equivalent of it out of box since the vast majority of the new MorphOS users will be people who grew up on something else than an old Amiga
Even if not, they will see it at the office or at the friend's using it.
It's just another of those features that a regular users will immediately reach for and won't be happy with a workaround nor an explanation why they don't need it.
Only expect to discover much more of those lamer/newbie/joe user features as (and if) MorphOS widens the audience...
Then again, there could be a bounty for that... If it's that trivial, put some money in and let someone implement it quickly.