Simple Photo manipulation features, similar to liqufy tool in photoshop.
What problem do you see this solving? When was the last time you were affected by this lack of functionality, or specific tool?
It will save the round trip to Photoshop when making minor changes to phyical features (slimming effect, etc), which ends up creating massive Tiff or PSD files.
Current workaround
Are you using any workarounds or other solutions to achieve your goals in Capture One?