I wholeheartedly agree with the swiping punctuation. That and swiping on the space bar to switch keyboard configuration is the main reason for sticking to SwiftKey. Writing in several languages where you need special characters in each language, having to hold down a button in order to switch the keyboard is frustratingly slow.
One extra point is also that SwiftKey inserts the most likely prediction when clicking space. Whenever I’ve used gboard, it’s so frustrating, that my fingers have to click the prediction in order to insert it.