Oh man that's annoying. It's by no means a perfect workaround. Every once in a while, swipes from the screen bottom right either opens the control center and does nothing or it'll open the control center as the app is closing. Minor annoyances for me. It beats using the home button so frequently. But this is only once in a while. Not nearly enough to bother me.
That sucks it's not as reliable for you. It didn't work great either until I found the sweet spot. For me, I do a curved swipe in the bottom right. I start in the corner at the bottom where the edge is, and do a slight curve towards the middle (only a very little...I'm still very much on the bottom right of the screen) and then swipe off the screen on the bottom quarter of the right edge. This works best and almost never fails. It's hard to explain but if you try to figure it out, I guarantee you'll get much better responses from the swipes.
Let me know how you make out.
Edit: Above I said I swipe towards the middle but that's a poor description. It's more of an inward swipe but it's very short and I immediately curl and swipe off the screen bottom right on the right edge. Hope that helps a little better.