If you actually read section 4.01(c) in the FT William basic though, the fail-safe described there doesn't make a lot of sense with respect to 401(a)(26), especially for the meaningful benefit part of 401(a)(26). Their EGTRRA document allowed you to specify a target benefit accrual (usually 0.5%, as per the Schultz memo), and if 401(a)(26) failed, you would increase benefits starting with the participants whose benefit accrual was the largest but less than the specified target amount. The PPA document says nothing about any target amount and instead says that you start by expanding the group of participants to include employees who would not otherwise be eligible.
I am with Dalai Pookah on this, I am curious why the old fail-safe was removed in the PPA document as it provides a more sensible default method for correcting a failure. We asked FT about this back when the PPA document came out, but did not get a satisfying reply - they said, basically, they did not think the IRS would approve their document with that language in it.
Like CuseFan, we have moved over to relying on retroactive corrective amendments when needed. However that comes with its own issues, including compliance with 1.401(a)(4)-11(g), 1.401(a)(26)-7(c), 436(c), and 412(d)(2).