While I do agree and have stopped using the Samsung keyboard, it does have many unique features that I still miss almost daily.
A few that come to mind:
- a special text editing mode (select all to the left, right; turn select mode on and then move around with arrowkeys while selecting, …)
- visual resizing of the keyboard
- "2D" cursor control (move cursor diagonally)
- swipe spacebar left/right to change input method (while having spacebar cursor control enabled!)