My biggest wishes:
- ability to use brushes with Exposure
- ability to show individual R, G, B channels in the viewport
- ability to specify Dodge and Burn amounts greater than 1
- better Dodge and Burn. eg. if a highlight gets blown in your exposure or curves or levels adjustment the Burn adjustment can't recover it.
- ability to reorder Adjustments. Even if only among adjustments of the same type
- ability to create a new adjustment by duplicating the selected adjustment (eg. create a new highlights and shadows adjustment with the same settings as the current one)
- ability to copy and paste brush strokes between adjustments. eg. I want to use the same brush strokes in my dodge adjustment as my curves adjustment
- ability to intractively work with individual retouch strokes. eg. I want to remove a particular stroke but it's not the latest one.
- ability to have more than one Retouch adjustment. eg. I want one adjustment for blemishes, one for flyaway hair, etc.
- ability to specify adjustments which are never lifted/stamped. eg. I never stamp crop or straightend or retouch from one image to another. It's a pain to have to constantly delete them from the lift window before stamping.
- keyboard shortcut for switching between "repair" and "clone" in Retouch
- keyboard shortcut for turning on/of color overlay in brush mode
- option to have grid always on in Straighten adjustment rather than just while dragging with the mouse
- remove the need to type the % when entering values manually in the Black&White adjustment
- ability to rotate the retouch source when cloning
- ability to have the clone source in a different image
Those are just the things that come to mind in my day to day work with Aperture. None of them are really showstopping issues but they are lots of little things that, if fixed/addressed would greatly improve my (and I'm sure others') workflow.
(feedback also submitted to Apple).