Feet Part 2: Simple Heels and Toes

I've been thinking about creating an EV3 Strider, but to handle the increased weight and width Strider needs to be improved in a few ways, like by increasing the amount of foot-contact it has with the ground.

One way to increase foot-contact is to add four more legs. To check how this would smooth the gait I simulated one side of a 12-legged Strider, and if you watch the video below you'll see Strider bounce whenever the feet touching the ground switch. This bouncing shouldn't be much of a problem at LEGO scale, but it would be at large scale.
 
While a scaled-up Strider's linkage could be optimized for a smoother gait, it can also be smoothed by adding feet. As an example, in the second half of the video I added small triangular feet to the front legs, which act like heels and toes. These feet reduce the gait's bumpiness by about 1/3rd.  However, the toes are more likely to catch on obstacles, which can cause the linkage to lock and gears to grind, so I wouldn't add them to an EV3 Strider.  I only posted the sim to show the effect of these simple feet.  

Any suggestions for Strider's feet?

UPDATE:  I tested a 12-legged EV3 Strider using LEGO but it was too wide and didn't steer that well.  It could be made much narrower with 3D printed leg parts, which is probably how a 12-legged Strider should be built.