Swiping with one finger is faster than typing with two in my experience. But you can have best of both worlds, my keyboard let's me swipe with two fingers at the same time (heliboard on f-droid)
The thing is, with Fleksy, as long as you get within a few characters of the letter, it counts, and you also switch auto-correct choices by swiping up or swiping down, so you can fix them easily. It's a joy to type with 2 hands, honestly.