Looks like this is the white iPhone 4 or the Verizon iPhone 4 (with dual-mode CDMA/GSM) or this is the iPhone 5. Or both. Or neither.
Regardless, I don't see how moving the antenna break point from next to the headphone jack down to the area above the mute switch and adding another break point on the top right side of the phone can make any difference with the "death grip" issue:
The "death grip" issue occurs most significantly when one bridges the UMTS/GSM antenna and the Bluetooth/WiFi/GPS antenna. Cell-phone manufacturers are, for regulatory and SAR reasons, not allowed to place the bulk of the cellphone antenna at the top of the phone (part closest to the brain), and so unless Apple has shortened the antennas and left a gap along the bottom (which doesn't make much sense), I can't see how this would change the death grip issue at all. Plus, one of the iPhone 4 "gaps" is cosmetic anyway, so who knows.
Therefore, could it make sense that this new phone has three antennas, rather than two? The extra break point might be there to separate the CDMA antenna from the UMTS/GSM antenna and the Bluetooth/WiFi/GPS antenna. The bottom section and the right section of the phone could be for GSM, the left section for CDMA, and the top section for Bluetooth/WiFi/GPS. Since the CDMA and GSM antennas will never be on at the same time, there would be no death grip issue when bridging the two with your hand, and since you could never really bridge the gap on the top right corner of the phone, there would be no death grip issue from GSM/WiFi? The only thing of which I am not sure is whether the signal attenuation occurs because you're bridging two active antennas or whether you're just bridging two antennas together (i.e. does bridging an inactive antenna with an active one cause signal degradation or not, or is it marginal).
Just my thoughts on that. Maybe it makes sense. Perhaps someone more knowledgeable about antenna hardware could chime in.