Toe-spring = reduced contact surface?

Not only do toe-springs reduce the contact surface area you have with the ground, but they also lead to foot-muscle weakness, making you prone for common foot problems such as plantar fasciitis. 

The effects of toe-springs has been poorly researched, until only last year, confirming what we've known for some time through experience. 

This is why one of our unconditional requirements for a functional shoe is that the toe-box should be flat, but also wide, foot shaped and flexible enough so that you can use and strengthen your toes!

Source:

Sichting, Freddy & Holowka, Nicholas & Hansen, Oliver & Lieberman, Daniel. (2020). Effect of the upward curvature of toe springs on walking biomechanics in humans

Download the full research paper here