You can now customize the arrow nudge distance (used for moving and keyboard-resizing) by using two hidden preferences, nudgeDistanceSmall and nudgeDistanceBig in the Terminal.app
// Example: this sets Arrow distance to 2 pixels, and Shift+Arrow to 8 pixels defaults write com.bohemiancoding.sketch3 nudgeDistanceSmall -float 2.0 defaults write com.bohemiancoding.sketch3 nudgeDistanceBig -float 8.0
Only text objects :| really annoying
Edit: this kinda worked for me
in Skecthtalk.io