Totally agree! I used blackberry keyboard on android for years, tried to switch to fleksy but still lacks functionality. Eventually found apk of blackberry keyboard from my old phone and happy with it:

- Swipe left anywhere to delete the word;

- Swipe down anywhere to go to symbols;

- Swipe up for particular word;

- Ctrl+C / Ctrl+V;

- Replacements;

- Custom symbol layout.

Just the best!