Notice that I was commenting on the current state of Sailfish 2.0, not on possible solutions.

Your suggestion could work, but would be quite unfair to left-handed people (and bit confusing, like Ubuntu Phone is) and still not very comfortable on the phone. On Jolla, I currently use mostly just the swipe from the right, because it is uncomfortable to do it from the other side while holding the phone in the right hand. I suspect that left handed people will have it vice versa.

It still doesn't solve the problem of easily getting back to an app. The systems I listed in the last post (except for BB 10) use an overlay for the notification overview, which allows to quickly get back to what you were doing. This is hard to do with the new concept.

Yes, that's a very good idea.