The two controllers I use a lot of on the keyboard is the "pitch bend" and the "sync."
The trick to using "sync" is to know in your mind what you want to do with a song, and if it's "break" then turn it on a few measures before you want the series of breaks. I play notes in the right hand in the silence. When done with your series of breaks, turn it off again so it doesn't get in the way. As Zuki said, it's another form of creativity.

If one is having difficulty using any of the controllers, the remedy would be to practice using them constantly until it becomes second nature. Some take longer than others to get a handle on. I had that problem when I first worked with pitch bend. Nowadays it comes natural. Everything eventually does, musical or non-musical, if you just practice it.

Lucky