First thoughts
I just replaced Word Flow with SwiftKey -- and I think I wish I had not. I want the apostrophe back in the punctuation pop-up. I don't like that, if I swipe a word, and it is not what I want, the delete key does not wipe the entire word -- i have to delete it character by character. I also preferred the more delicate line that traced your swiping in Word Flow, though of all these things, I can live with the bolder SwiftKey line.
Chris