Cages, whether with straps or not, are not a halfway house to clipless, or even a compromise. They are a solution that many people feel ideal for their cycling needs.

I use variations of the op's clips on all my bikes. I have fitted them using made-to-measure blocks between the pedal and the clips to ensure that my feet are in exactly the right position on the pedal for me, whether on my road, mountain or hybrid bikes.. My feet have never slipped off the pedals even when pushing hard and I have never had any problems with foot pain/tiredness, even on centuries.

They have the bonus of being very inexpensive and mean I don't walk like a duck at coffee stops, and can even stop and go to for walks in the middle of rides if I wish.

I am not a competition/racing cyclist and clipless may be of benefit if I were.