EDITED: This is just a compilation of Affinity Photo and Designer roadmaps by TonyB and MEB's "Common Feature Requests INDEX", just to be easily found.
Everything that is already implemented is removed.
I hope that Affinity staff would not get angry for doing this on my own. Just want to keep things clear.
Designer
Phase II transparency flattener
Bleed area guides
Mesh fill tool
Mesh warp/distort tool
Knife tool
Calligraphic line styles
Export slices previews with actual export data
Pages
Text features including Bullets and Numbering
Knockout groups
Multiple Effects/Fills/Strokes per shape
Convert Pixel selection to Vector shape
Replicate/Blend
Tracing Tool/Persona
Vector Eraser
Vector Patterns
Feathering
Simplify paths / Line Smoothing
Arrowheads
Photo
Looks persona
Levels improvements
Curve Improvements
Export persona - preview with compression and palette optimisation
Non destructive Develop Layer
Tool Presets
User categories in the media browser for shapes and objects
Support for image layer Spot channels
Crop to Selection
Crop & Resize (single step)
Freehand Selection Tool more similar to PS Lasso
Both
User Interface Icons / Customization
Progress bar/visual feedback on file loading/saving
Remember last used folder used for each type of action (open, save etc).
Sticky Settings (remember tools settings) - It's being implemented / work in progress in 1.5 / 1.6 versions
Support to RTL (right-to-left) Languages (Arabic, Hebrew etc)
Change rulers origin point / relative origin point
Allow guide creation from all tools
Lock Guides
Image/file linking
Select objects by attributes (same fill, stroke, font etc)
Ability to export/save to the same folder as the source (opened file)
Rotate & Scale objects using the Rotation Centre as reference point - Already available in Designer 1.6 Beta
Background Blur Layer Effect (FX)
Noise/Grain
Export PSD text as native text
DXF/DWG