I ride Time's as well, and have never felt TOO Secure. I'd suggest any of Shimano's or Shimano Copies that have an adjustable spring tension.
Before my Time's I had a pair of Wellgo SPD, and I had the tension set full ON, so I wouldn't unclipped accidentily. If you set the spring full OFF, I'm sure your foot would easily pop out when you wanted to DAB.
L8R
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