What I’d really like are a few changes to allow me to set perspectives up similarly to the Things UI:
A ‘Today’ perspective with a Forecast-style mini calendar (even better, the option to include such a calendar in any custom perspective)
More options for the Forecast perspective: only including certain contexts/projects, being able to ONLY show deferred items rather than due
This one isn’t related to Things, but it’d be insanely great to have ‘smart folder/playlist’ type options for custom perspectives. I miss this about the Schoolhouse app I used in college before discovering OmniFocus or GTD in general. (With that kind of power one could set up almost any sort of perspective they’d want.)
Basically, some UI elements from Things and some customizatization options from Schoolhouse/iTunes/Finder.