I do mostly rocky/rooty technical trails here in NE. I had been using straight platforms without any straps for over 20 years and I've suffered my share of shin hits. It's simply impossible sometimes to keep a foot planted on the pedal when traversing especially rough terrain. Still, there is no way I will lock my feet to the pedals knowing how many times I've saved my neck with a REALLY fast foot plant.
However, something that I recently started to use with great success are a set of Power Grips. They allow for really quick entry since they hold their shape and instantaneous exit similar to my old platforms. The best part is that when fully engaged they provide a tight and non-slip grip on my trail shoes. These have been the perfect solution for me. Recently, one of my riding buddies also switched to them after years of riding clipless pedals. He told me he was fed up with taking unnecessary falls and found the Power Grips to be a great alternative. They are worth a try for anyone who doesn't want to worry about un-clipping.