Although the legality is a bit vague, the safety of ignoring "RF required" at Palomar with a vector past the RF legs is difficult to argue. It's another place where regulations lag behind technology. Luckily, the FAA is clear on some points. Ignoring "ADF Required," "DME Required," and "Dual VORs Required" because you have an IFR GPS is spelled out in AC 90-108. It also tells you how to use GPS for DME even if it's in the title of an approach, so long as the DME is for along-track distance rather than lateral guidance. DME arcs in the final segment are rare.
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