Bloggs, we are off topic now, all I will say is :
1. The rest of the world have implemented SBAS first.
2. There are over 7000 APV approaches published, available to those with suitably equipped aircraft (TSO C145 or 146)
3. These are flown using both the latral and vertical guidance information.
If you don't think this clearly demonstrates the rest of the world has realised the safety benefits of SBAS, well....