Because the heat shield flares out, like the skirt of a spinning figure skater, the spin does not have to be large in order to hold open the shield. The forces are directly proportional to the diameter of the flared shield and are proportional to the square of the spin speed. The intention is for the shield to make itself significantly larger than the craft that it is protecting, allowing for larger forces holding it open than the forces on the lander’s parts. Some of the deployable parts of the lander may need to be held better than for a non-spinning reentry, but that should be possible. It may be possible to make the lander a de-spun section, allowing for this shield to be used on manned missions.

What amazes me most on this topic is that the heat shield is designed as a flexible item. This is the first time that I have heard of a flexible reentry heat shield.

High mass craft will fly apart or at least break.

I could see this being useful for small sat sized craft under 10 LB’s. Basically a good solid sensor pack injected into a planets atmosphere in hopes it can slow down enough to land still working.